Asked by Kleen

An ordinary die is thrown seven times.find the probability of obtaining exactly three sixes

Answers

Answered by Reiny
prob(six) = 1/6
prob(not six) = 5/6

prob(as stated) = C(7,3) (1/6)^3 (5/6)^4
= 35(1/216)(625/1296) = ....
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