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If I roll a fair, regular six-sided die four times, what is the probability that I will roll the number  exactly three times?

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 Dec 23, 2017
edited by Guest  Dec 23, 2017
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We have a (1/6)  probability of rolling any number on any roll.....so...to roll the same number three times out of four we have

 

C(4,3)  (1/6)^3 (5/6)  =  5/324  ≈ 1.5%

 

 

cool cool cool

 Dec 23, 2017

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