Berarti
Ruang sampel = 15C3 = 15!/(12!.3!) = (13 x 14 x 15)/6 = 182 x (5/2) = 455
a.pertama merah, kedua putih, ketiga biru, berarti :
5C1 x 7C1 x 3C1 / 455 = 105/455 = 21/91
b. 2 putih, 1 biru, berarti :
7C2 x 3C1 / 455 = 21 x 3 / 455 = 63/455 = 9/65
c. 3 putih , berarti :
7C3 / 455 = 35/455 = 7/91
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Berarti
Ruang sampel = 15C3 = 15!/(12!.3!) = (13 x 14 x 15)/6 = 182 x (5/2) = 455
a.pertama merah, kedua putih, ketiga biru, berarti :
5C1 x 7C1 x 3C1 / 455 = 105/455 = 21/91
b. 2 putih, 1 biru, berarti :
7C2 x 3C1 / 455 = 21 x 3 / 455 = 63/455 = 9/65
c. 3 putih , berarti :
7C3 / 455 = 35/455 = 7/91