## The Three Birthday Problem

A while ago one of my aunts posted that 3 of her Facebook friends were having a birthday that day. It seems like a remarkable coincidence, but is it? This observation is reminiscent of a well known problem in probability that yields a surprising result.
The Conventional 2 Birthday Problem The conventional probability theory known as the birthday problem or birthday paradox concerns the probability that, given a group of N people, at least two such people in the group have the same birthday.
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