Posted by **Nikki** on Sunday, January 27, 2013 at 6:36pm.

Suppose you roll a fair die 18 times.

(a) What is the sample space?

(b) What is the probability that each number from 1 to 6 appears exactly thrice?

(c) What is the probability that the number 1 appears exactly twice, 3 appears exactly four

times, and 5 appears exactly six times?

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