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probability of rolling a single die 8 times and getting exactly 4 three"s

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dont know how to solve

Oct 26th, 2014

By the Binomial distribution with P(S)=1/6 and P(F) =5/6

8C4 (S)^4 (F)^4 = 8!/4! *(8-4)! * (1/6)^4 * (5/6)^4

                           = 70 * 625/6^8

                          =    43750  /1679616

                          = 21875/839808

                          = 0.026 approximately

       


Oct 26th, 2014

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Oct 26th, 2014
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Oct 26th, 2014
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