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OpenStudy (anonymous):
Find the chance of a "match": that is, at least two people in the room have the same birthday. if there are 400 people in the room .
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OpenStudy (anonymous):
for n>366 (in case of leap year) it is 1... because you can't have more than that number of mutually exclusive days to be born on, i.e. after 366 you run out of days!
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