06.18d. The Birthday Problem. Professor Diaconis
came to give a Patten Lecture here this spring, and I've been referring to every since.
One of his lectures took the birthday problem as a starting point.
Philip J. Erdelsky has a good page on
it, and he state its essence:
The probability that at least two of N people have the same birthday rises above 0.5
when N=23.
[This page is
http://www.rasmusen.org/w/04.06.18d.htm]
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