0.04705882
Пошаговое объяснение:
P = m/n,
n = C(из 36 по 3) = 36!/(3!*33!) = 34*35*36/6 = 34*35*6,
m = 4*C(из 9 по 3) = 4*(9!/(3!*6!)) = 4*7*8*9/6 = 2*7*8*3,
P = (2*7*8*3)/(34*35*6) = 7*8/(34*35)
0.04705882
Пошаговое объяснение:
P = m/n,
n = C(из 36 по 3) = 36!/(3!*33!) = 34*35*36/6 = 34*35*6,
m = 4*C(из 9 по 3) = 4*(9!/(3!*6!)) = 4*7*8*9/6 = 2*7*8*3,
P = (2*7*8*3)/(34*35*6) = 7*8/(34*35)