Kenneth S. answered • 05/16/16

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This is binomial distribution (Bernoulli trials), with probability of success (sixes) p = 1/6 & probability of failure 5/6.

The term representing P(2 successes, 2 failures) is equal to

_{4}C_{2}times (1/6)^{2}and also times (5/6)^{2 }=**0.11574.***I believe that Richard's calculation is not correct (omits factor (5/6) squared).*

Kenneth S.

05/16/16