Solved: Assume that birthdays are equally likely to occur in any one of the 12 months of

Chapter 9, Problem 32

(choose chapter or problem)

Assuming that all years have 365 days and all birthdays
occur with equal probability, how large must n be so that in
any randomly chosen group of n people, the probability that
two or more have the same birthday is at least 1/2? (This is
called the birthday problem. Many people find the answer
surprising.)

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