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In group of 100 what is the expected number of pairs of peole who have the same birthday

In group of 100 what is the expected number of pairs of peole who have the same birthday
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In group of 100 what is the expected number of pairs of peole who have the same birthday

User Bob Flannigon
by
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2 Answers

5 votes
1 pair is the correct answer according to the Birthday problem method. :)
User Marty Trenouth
by
7.4k points
2 votes
50. That is the expected number. Because 100 divided by 2 equals 50. 
User Justabuzz
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