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Kelas 10 MatematikaBab Peluang
Karena mempertahatikan susunan, yaitu ketua, wakil, bendahara, maka menggunakan permutasi
7P3 = 7! / (7 - 4) !
7P3 = 7 . 6 . 5 . 4 . 3 ! / 3 !
7P3 = 7 . 6 . 5 . 4
7P3 = 840