math hw birthday and months problem

Mathematics
Tutor: None Selected Time limit: 1 Day

How many people do you need to gather to be sure at least two of them have birthdays in the same month?

Sep 16th, 2014

The answer is 13


If there are only 12 people, there is a
possibility that each has a birthday in a
different month
please choose mes best thanks

Sep 16th, 2014

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Sep 16th, 2014
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Sep 16th, 2014
Dec 5th, 2016
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