Question

Suppose you roll 100 dice. What are the odds that 25 or more of them come up "6"?

Answer 1

1/6

Explanation:

The probability of an event happening k times in n trials if the probability of the event is called p is the binomial distribution probability:

P(k times in n trials) = (Ckn)pk(1-p)n-k where the 1st term is the combination of n things k at a time or

n!/(k!(n-k)!)

In this case n is 100, k is 25 and P = 1/6

Hope that helps.