(The birthday problem) Suppose there are C people, each of whose birthdays (month and day only) are equally likely to fall on any of the 365 days of a normal (i.e., non-leap) year
(a) SupposeC=2 What is the probability that the two people have the same exact birthday?
(b) Suppose C ≤ 2. What is the probability that all C people have the same exact birthday?
(c) Suppose C ≤ 2. What is the probability that some pair of the C people have the same exact birthday? (d) What is the smallest value of C such that the probability in part (c) is more than 05? Do you find this result surprising?