Hi,

A fair die is to be rolled 12 times. p(rolling a five) = 1/6

BINOMIAL Distribution P(x) = nCx*  

where p and q are the probabilities of success and failure respectively. 

In this case p = 1/6 & q = 5/6 & n = 12   nCx = 

For ex:   P(rolling 12 fives) =

Recommend using Your TI calculator for cumulative probabilities.

and stattrek.com as an excellent reference. 

What is the probability of getting at most two fives? binomcdf(12, 1/6, 2)

 

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