{"id":281504,"date":"2020-04-14T20:06:56","date_gmt":"2020-04-14T13:06:56","guid":{"rendered":"https:\/\/quipperhome.wpcomstaging.com\/?p=281504"},"modified":"2023-02-07T15:29:53","modified_gmt":"2023-02-07T08:29:53","slug":"peluang-matematika-kelas-12","status":"publish","type":"post","link":"https:\/\/quipperhome.wpcomstaging.com\/mapel\/matematika\/peluang-matematika-kelas-12\/","title":{"rendered":"Pahami Materi Peluang, Konsep dan Rumus Peluang serta Cara Menghitungnya"},"content":{"rendered":"<div id=\"attachment_281536\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-281536\" class=\"size-full wp-image-281536\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-1.png\" alt=\"Peluang - Matematika Kelas 12\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-1.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-1-768x512.png 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-1-585x390.png?crop=1 585w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-1-263x175.png?crop=1 263w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-1-300x200.png 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281536\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Hai Quipperian, apa kabar semua? Masih <\/span><em><span style=\"font-weight: 400;\">stay <\/span><\/em><span style=\"font-weight: 400;\">di rumah <\/span><em><span style=\"font-weight: 400;\">aja, <\/span><\/em><span style=\"font-weight: 400;\">kan? Tahan diri untuk enggak <\/span><em><span style=\"font-weight: 400;\">nongki-nongki <\/span><\/em><span style=\"font-weight: 400;\">dulu, ya, demi keselamatan bersama! Oke, masuk ke pembahasan artikel, yuk.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Permainan ular tangga merupakan salah satu permainan beken zaman dulu yang mungkin sudah jarang ditemukan sekarang. Untuk menjadi juara ular tangga, seseorang tidak membutuhkan trik khusus.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hal itu karena si pemain cukup melemparkan sebuah dadu sebagai dasar pergerakan dari satu petak ke petak lainnya. Misalnya saja, Ande ingin berada di petak 5 karena ada tangga yang bisa membuatnya naik ke tingkat yang lebih tinggi.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jika saat ini Ande berada di petak 2, berapa peluang Ande bisa maju ke petak 5? Untuk menuju petak 5, Ande harus berjalan 3 langkah. Artinya, dadu harus menunjukkan angka 3. Ingat, dadu memiliki enam sisi, sehingga peluang munculnya angka 3 adalah <\/span><span style=\"font-weight: 400;\">3<\/span><span style=\"font-weight: 400;\">6<\/span><span style=\"font-weight: 400;\"> atau setengah.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tak disangka, permainan ular tangga menerapkan prinsip matematika yang disebut sebagai peluang. Materi peluang itulah yang akan kamu pelajari di artikel kali ini. Penasaran? Yuk, langsung aja.<\/span><\/p>\n<h2><strong>Pengertian Peluang<\/strong><\/h2>\n<p>&nbsp;<\/p>\n<div id=\"attachment_281535\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-281535\" class=\"size-full wp-image-281535\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-2.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-2.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-2-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-2-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281535\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Peluang adalah besarnya probabilitas atau kemungkinan berlangsungnya suatu kejadian. Konsep peluang ini tidak hanya diterapkan pada hal-hal yang bersifat sederhana seperti permainan dadu, melainkan pada hal yang lebih kompleks, seperti investasi, ramalan cuaca, asuransi, dan lainnya. Itulah mengapa, materi peluang perlu dikenalkan sejak di bangku sekolah.<\/span><\/p>\n<h2><strong>Konsep Dasar Peluang<\/strong><\/h2>\n<div id=\"attachment_281534\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-281534\" class=\"size-full wp-image-281534\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-3.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-3.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-3-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-3-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281534\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Konsep dasar peluang merupakan penjabaran lebih rinci tentang besaran-besaran apa yang harus kamu kuasai. Konsep ini diperoleh melalui percobaan. Adapun konsep dasar peluang meliputi ruang sampel dan titik sampel.<\/span><\/p>\n<h3><strong>1. Ruang Sampel<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Ruang sampel adalah himpunan semua kemungkinan hasil yang didapatkan dari suatu percobaan. Ruang sampel biasa dinyatakan sebagai <\/span><em><span style=\"font-weight: 400;\">S<\/span><\/em><span style=\"font-weight: 400;\">. Contohnya, ruang sampel dari dadu adalah angka 1, 2, 3, 4, 5, dan 6.<\/span><\/p>\n<h3><strong>2. Titik Sampel<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Titik sampel adalah bagian dari ruang sampel. Contohnya adalah saat kamu melemparkan satu buah dadu, salah satu kemungkinan angka yang akan keluar adalah 4.<\/span><\/p>\n<p><strong>Perhatikan contoh soal berikut.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Dari seperangkat kartu <\/span><em><span style=\"font-weight: 400;\">bridge<\/span><\/em><span style=\"font-weight: 400;\">, akan diambil satu kartu secara acak. Tentukan ruang sampel percobaan tersebut!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dalam seperangkat kartu <\/span><em><span style=\"font-weight: 400;\">bridge<\/span><\/em><span style=\"font-weight: 400;\">, ada 4 jenis kartu, yaitu hati, sekop, wajik, dan keriting. Masing-masing kartu terdiri atas 13 kartu, yaitu As sampai King.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281524\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-a.png\" alt=\"\" width=\"382\" height=\"176\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-a.png 382w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-a-300x138.png 300w\" sizes=\"(max-width: 382px) 100vw, 382px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Dengan demikian, ruang sampelnya adalah 4 \u00d7 13 = 52 kartu.<\/span><\/p>\n<h2><strong>Pengertian Peluang Klasik<\/strong><\/h2>\n<div id=\"attachment_281533\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-281533\" class=\"size-full wp-image-281533\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-4.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-4.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-4-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-4-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281533\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Peluang klasik adalah peluang pertama yang dipelajari oleh para matematikawan di abad ke-17 dan 18. Semua kejadian yang akan terjadi ditentukan melalui ruang sampel.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pada peluang jenis ini, semua kejadian diasumsikan memiliki peluang yang sama untuk terjadi. Misalnya kamu mengambil satu kartu <\/span><em><span style=\"font-weight: 400;\">bridge<\/span><\/em><span style=\"font-weight: 400;\">, masing-masing kartu <\/span><em><span style=\"font-weight: 400;\">bridge<\/span><\/em><span style=\"font-weight: 400;\"> yang kamu ambil memiliki peluang yang sama, yaitu <\/span><span style=\"font-weight: 400;\">1\u204452<\/span><span style=\"font-weight: 400;\">.<\/span><span style=\"font-weight: 400;\">&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk menentukan peluang kejadian A, kamu harus membandingkan antara banyaknya kejadian A dan banyaknya keluaran pada ruang sampel. Secara matematis, kejadian A ditulis sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281523\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-b.png\" alt=\"\" width=\"163\" height=\"83\"><\/span><\/p>\n<p><strong>Perhatikan contoh soal berikut.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">dari seperangkat kartu <\/span><em><span style=\"font-weight: 400;\">bridge<\/span><\/em><span style=\"font-weight: 400;\">, akan diambil kartu merah bernomor 10. Tentukan peluang terambilnya kartu merah bernomor 10!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Seperangkat kartu <\/span><em><span style=\"font-weight: 400;\">bridge<\/span><\/em><span style=\"font-weight: 400;\"> terdiri dari 52 kartu. Artinya, banyaknya ruang sampel percobaan tersebut <\/span><em><span style=\"font-weight: 400;\">n<\/span><\/em><span style=\"font-weight: 400;\">(S) = 52. Terambilnya kartu merah bernomor 10 menunjukkan <\/span><em><span style=\"font-weight: 400;\">n<\/span><\/em><span style=\"font-weight: 400;\">(A) = 2.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281522\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-c.png\" alt=\"\" width=\"217\" height=\"153\"><\/p>\n<p><span style=\"font-weight: 400;\">Berdasarkan teori peluang klasik diperoleh:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281521\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-d.png\" alt=\"\" width=\"147\" height=\"163\"><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, peluang terambilnya kartu warna merah nomor 10 adalah <\/span><span style=\"font-weight: 400;\">1\u204426<\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><strong>Kejadian-Kejadian Komplemen<\/strong><\/h2>\n<div id=\"attachment_281532\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-281532\" class=\"size-full wp-image-281532\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-5.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-5.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-5-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-5-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281532\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Konsep penting lainnya yang harus kamu pelajari di materi peluang ini adalah kejadian yang saling berkomplemen. Komplemen kejadian A adalah kejadian yang terjadi di ruang sampel selain A. Kejadian komplemen ini biasa dinyatakan dengan A<\/span><sup><span style=\"font-weight: 400;\">c<\/span><\/sup><span style=\"font-weight: 400;\">. Secara matematis, dirumuskan sebagai berikut.<\/span><\/p>\n<p><strong><em>n<\/em><\/strong><strong>(A<\/strong><sup><strong>c<\/strong><\/sup><strong>) = <\/strong><strong><em>n<\/em><\/strong><strong>(S) \u2013 <\/strong><strong><em>n<\/em><\/strong><strong>(A)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Mengingat semua jumlah kejadian = 1, maka persamaan di atas menjadi seperti berikut.<\/span><\/p>\n<p><strong><em>P<\/em><\/strong><strong>(A)&nbsp; + <\/strong><strong><em>P<\/em><\/strong><strong>(A<\/strong><sup><strong>c<\/strong><\/sup><strong>) =&nbsp; 1 atau <\/strong><strong><em>P<\/em><\/strong><strong>(A<\/strong><sup><strong>c<\/strong><\/sup><strong>) = 1 &#8211; <\/strong><strong><em>P<\/em><\/strong><strong>(A)<\/strong><\/p>\n<p><strong>Untuk lebih jelasnya, simak contoh soal berikut.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Jika peluang siswa SMA Taruna gagal dalam ujian adalah 0,0001, tentukan peluang siswa SMA Taruna berhasil dalam ujian!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Misalkan A adalah kejadian siswa SMA Taruna gagal dalam ujian. Dengan demikian, A<\/span><sup><span style=\"font-weight: 400;\">c<\/span><\/sup><span style=\"font-weight: 400;\"> adalah kejadian SMA Taruna berhasil dalam ujian. Berdasarkan persamaan komplemen kejadian, diperoleh:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">P<\/span><\/em><span style=\"font-weight: 400;\">(A<\/span><sup><span style=\"font-weight: 400;\">c<\/span><\/sup><span style=\"font-weight: 400;\">) = 1 &#8211; <\/span><em><span style=\"font-weight: 400;\">P<\/span><\/em><span style=\"font-weight: 400;\">(A)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;= 1 \u2013 0,0001<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;= 0,9999<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, peluang siswa SMA Taruna berhasil dalam ujian adalah 0,9999.<\/span><\/p>\n<h2><strong>Peluang Empirik<\/strong><\/h2>\n<div id=\"attachment_281531\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-281531\" class=\"size-full wp-image-281531\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-6.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-6.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-6-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-6-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281531\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Peluang empirik adalah peluang suatu kejadian yang diperoleh dari hasil observasi atau kejadian nyata. Secara matematis, peluang empirik dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281520\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-e.png\" alt=\"\" width=\"333\" height=\"88\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-e.png 333w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-e-300x79.png 300w\" sizes=\"(max-width: 333px) 100vw, 333px\" \/>&nbsp;<\/span><\/p>\n<p><strong>Perhatikan contoh soal berikut.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Suatu perusahaan ingin meneliti pilihan transportasi masyarakat dari Jakarta ke Bandung. Perusahaan tersebut memilih 100 responden dari beberapa kecamatan di Jakarta. Hasil dari penelitian tersebut ditunjukkan oleh tabel berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281519\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-f.png\" alt=\"\" width=\"296\" height=\"231\"><\/p>\n<p><span style=\"font-weight: 400;\">Tentukan peluang masyarakat memilih mobil umum dari Jakarta ke Bandung!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jika A adalah kejadian masyarakat memilih mobil umum, ini berati <\/span><em><span style=\"font-weight: 400;\">f<\/span><\/em><span style=\"font-weight: 400;\">(A) = 15. Dengan demikian, peluang kejadian A adalah sebagai berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281518\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-g.png\" alt=\"\" width=\"343\" height=\"140\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-g.png 343w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-g-300x122.png 300w\" sizes=\"(max-width: 343px) 100vw, 343px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, peluang masyarakat memilih mobil umum dari Jakarta ke Bandung adalah 0,15 atau 15%.<\/span><\/p>\n<h2><strong>Aturan Penjumlahan Peluang<\/strong><\/h2>\n<div id=\"attachment_281530\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-281530\" class=\"size-full wp-image-281530\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-7.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-7.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-7-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-7-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281530\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Aturan penjumlahan peluang merupakan metode yang digunakan ketika dua kejadian atau lebih berlangsung secara beriringan.<\/span><\/p>\n<h3><strong>1. Kejadian Tidak Saling Lepas<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Contohnya saat pemilihan ketua OSIS. Saat memilih ketua OSIS, kamu ingin tahu apakah calon ketua OSIS-mu ganteng dan pintar, atau pintar saja tetapi tidak ganteng, atau ganteng saja tetapi tidak pintar?&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Kejadian ini disebut kejadian tidak saling lepas. Aturan penulisan kejadian tidak saling lepas adalah sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Rumus untuk kejadian A dan B tidak saling lepas.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281517\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-h.png\" alt=\"\" width=\"275\" height=\"51\"><\/p>\n<h3><strong>2. Kejadian Saling Lepas<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Contohnya adalah kamu ingin tahu apakah calon ketua OSIS-nya laki-laki atau perempuan. Artinya, tidak mungkin seseorang bersamaan antara laki-laki atau perempuan.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dengan demikian, kejadian tersebut dinamakan kejadian saling lepas. Secara matematis, dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Rumus untuk kejadian A dan B saling lepas.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281516\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-i.png\" alt=\"\" width=\"203\" height=\"55\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-i.png 203w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-i-200x55.png 200w\" sizes=\"(max-width: 203px) 100vw, 203px\" \/><\/p>\n<h2><strong>Aturan Perkalian Peluang<\/strong><\/h2>\n<div id=\"attachment_281529\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-281529\" class=\"size-full wp-image-281529\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-8.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-8.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-8-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-8-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281529\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Pada prinsipnya, aturan perkalian hampir sama dengan penjumlahan. Hal yang membedakan adalah contoh kasusnya.<\/span><\/p>\n<h3><strong>1. Kejadian Tidak Saling Bebas<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Misalnya kamu memiliki 3 lusin buku dengan rincian 1 lusin buku sains, 1 lusin buku fiksi, dan 1 lusin buku novel. Saat kamu mengambil sebuah buku tanpa pengembalian, tentunya akan akan berpengaruh pada jumlah keseluruhan buku, kan?&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Artinya, peluang pada pengambilan kedua berbeda dengan pengambilan pertama karena buku tidak dikembalikan kembali.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Secara matematis, kejadian tidak saling bebas kejadian A dan B dirumuskan sebagai berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281515\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-j.png\" alt=\"\" width=\"219\" height=\"52\"><\/p>\n<h3><strong>2. Kejadian Saling Bebas<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Contohnya kamu melemparkan koin dan dadu secara bersamaan. Kamu ingin tahu peluang munculnya koin bergambar angklung dan dadu bernomor 5.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jelas bahwa koin dan dadu tidak saling berpengaruh satu sama lain. Kejadian ini disebut kejadian saling bebas. Secara matematis, kejadian A dan B saling bebas dirumuskan sebagai berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281514\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-k.png\" alt=\"\" width=\"197\" height=\"59\"><\/p>\n<h2><strong>Peluang Kejadian Bersyarat<\/strong><\/h2>\n<div id=\"attachment_281528\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-281528\" class=\"size-full wp-image-281528\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-9.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-9.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-9-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-9-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-281528\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Pada keadaan tidak saling bebas, kamu mengenal persamaan berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281513\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-l.png\" alt=\"\" width=\"360\" height=\"242\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-l.png 360w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-l-300x202.png 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/p>\n<p><em><span style=\"font-weight: 400;\">P<\/span><\/em><span style=\"font-weight: 400;\">(B|A) dibaca peluang kejadian B terjadi setelah A.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Nah, untuk mengasah kemampuanmu tentang aturan penjumlahan dan perkalian peluang serta peluang kejadian bersyarat, simak contoh soal berikut.<\/span><\/p>\n<p><strong>Contoh Soal 1<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Berikut ini merupakan data sebaran anggota serikat buruh dari 5 kota besar di Indonesia.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281512\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-m.png\" alt=\"\" width=\"272\" height=\"166\"><\/p>\n<p><span style=\"font-weight: 400;\">Jika hendak dipilih 1 orang secara acak untuk menjadi ketua serikat buruh, tentukan peluang terpilihnya ketua serikat buruh dari Kota Bandung atau Padang!<\/span><\/p>\n<p><strong>Pembahasan:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Diketahui: <\/span><em><span style=\"font-weight: 400;\">n<\/span><\/em><span style=\"font-weight: 400;\"> = 1.297<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Misalkan A adalah kejadian terpilihnya ketua serikat buruh dari Bandung dan B kejadian terpilihnya ketua serikat buruh dari Padang. Kedua kejadian tersebut tidak mungkin terjadi secara bersamaan, sehingga disebut kejadian saling lepas.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281511\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-n.png\" alt=\"\" width=\"228\" height=\"186\"><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, peluang terpilihnya ketua serikat buruh dari Kota Bandung atau Padang adalah <\/span><span style=\"font-weight: 400;\">427\u20441297<\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><strong>Contoh Soal 2<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Departemen Kepolisian suatu kota melaporkan bahwa tahun 2014 terjadi 10 kasus, 2015 terjadi 8 kasus, dan 2016 terjadi 5 kasus kejahatan. Jika pihak kepolisian akan memilih dua kasus secara acak, tentukan peluang terpilihnya kasus pada tahun 2014.<\/span><\/p>\n<p><strong>Pembahasan:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Pemilihan kasus pertama akan berpengaruh pada kasus kedua karena banyaknya kasus pada pemilihan kedua akan berkurang. Ini berarti, pemilihan kasus kejahatan pertama di tahun 2014 dan pemilihan kasus kedua tahun 2014 merupakan kejadian tidak saling bebas. Dengan demikian, diperoleh:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281510\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-o.png\" alt=\"\" width=\"321\" height=\"144\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-o.png 321w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-o-300x135.png 300w\" sizes=\"(max-width: 321px) 100vw, 321px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, peluang terpilihnya kasus dari tahun 2014 adalah <\/span><span style=\"font-weight: 400;\">45\u2044253<\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><strong>Contoh Soal 3<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">SMA Manggala memberikan kuesioner tentang setuju tidaknya para siswa untuk melakukan <\/span><em><span style=\"font-weight: 400;\">study tour<\/span><\/em><span style=\"font-weight: 400;\"> ke TMII. Kuesioner tersebut dibagikan pada seratus siswa kelas IX. Berikut jawabannya.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281509\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-p.png\" alt=\"\" width=\"538\" height=\"116\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-p.png 538w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-p-300x65.png 300w\" sizes=\"(max-width: 538px) 100vw, 538px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jika pihak sekolah ingin mengambil jawaban satu orang secara acak, tentukan peluang terpilihnya jawaban ya dari siswa laki-laki!<\/span><\/p>\n<p><strong>Pembahasan:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Kejadian tersebut bersyarat. Artinya, siswa harus memberikan jawaban ya\/tidak, barulah pihak sekolah akan mengambil jawabannya.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-281508\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-q.png\" alt=\"\" width=\"297\" height=\"218\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-q.png 297w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/04\/Peluang-Matematika-Kelas-12-q-80x60.png 80w\" sizes=\"(max-width: 297px) 100vw, 297px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, peluang siswa laki-laki yang menjawab ya adalah 0,6 atau 60%.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Untuk lebih memahami lagi materinya, yuk tonton video di bawah ini!&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:513,&quot;3&quot;:{&quot;1&quot;:0},&quot;12&quot;:0}\">Untuk lebih memahami lagi materinya, yuk tonton video di bawah ini!<\/span><\/p>\n<p><iframe title=\"Peluang, Kelas 12 - Pelajari demi peluang masuk PTN impian! | Matematika - Quipper Video\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/N2qYOzSxMHk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Sekian materi kali ini tentang peluang. Semoga bermanfaat bagi kamu semua. Jangan lupa untuk tetap belajar, berusaha, dan berdoa. Jika Quipperian ingin melihat pembahasan peluang lebih lanjut, silakan gabung bersama <\/span><a href=\"https:\/\/learn.quipper.com\/\"><strong>Quipper Video<\/strong><\/a><span style=\"font-weight: 400;\">, ya. Bersama Quipper Video, belajar jadi lebih mudah dan menyenangkan. Salam Quipper!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">[spoiler title=SUMBER]<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"><a href=\"https:\/\/d14fikpiqfsi71.cloudfront.net\/media\/W1siZiIsIjIwMTcvMDEvMjUvMDMvNDgvMTEvMjRmNWI4YmYtYjJhZS00YmI2LTk5NjYtODYxNDAyODc0YTBjL01hdGVtYXRpa2FLMTFTMTkucGRmIl1d.pdf?sha=b858417b554487a7\" rel=\"nofollow\">https:\/\/d14fikpiqfsi71.cloudfront.net\/media\/W1siZiIsIjIwMTcvMDEvMjUvMDMvNDgvMTEvMjRmNWI4YmYtYjJhZS00YmI2LTk5NjYtODYxNDAyODc0YTBjL01hdGVtYXRpa2FLMTFTMTkucGRmIl1d.pdf?sha=b858417b554487a7<\/a><\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\"><a href=\"https:\/\/learn.quipper.com\/en\/courses\/58170a79ccecee00110075ae%5B\/spoiler%5D\" rel=\"nofollow\">https:\/\/learn.quipper.com\/en\/courses\/58170a79ccecee00110075ae%5B\/spoiler%5D<\/a><\/span><\/li>\n<\/ul>\n<p><strong>Penulis: Eka Viandari<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hai Quipperian, apa kabar semua? Masih stay di rumah aja, kan? Tahan diri untuk enggak nongki-nongki dulu, ya, demi keselamatan bersama! Oke, masuk ke&hellip;<\/p>\n","protected":false},"author":99400369,"featured_media":281536,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[679384888,679384865],"tags":[679385780],"ppma_author":[679386827,679386836],"class_list":["post-281504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mapel","category-matematika","tag-matematika-kelas-12"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pahami Materi Peluang, Konsep dan Rumus Peluang serta Cara Menghitungnya - Quipper Blog<\/title>\n<meta name=\"description\" content=\"Quipperian, ternyata ada banyak banget yang bisa dipelajari dari materi peluang, lho. 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