- #1

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253/364= 69%

Anyway, this isnt my question.

This is:

Consider the following, 15 people are placed in a room, all of whom are born in January. What is the probability that 2 people have the same birthday?

However, using the same logic as the previous problem we end up with 105 pairs which is to be divided be 31.

Which isnt true.

Any ideas?