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how many people do you need to have in a room before you know for sure 5 have been born in the same month

asked
User Zlopez
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1 Answer

4 votes

Answer:

49

Explanation:

You want to know the number of people you need to have in a room before you know for sure 5 have been born in the same month.

Not in the same month

You can have as many as 48 people in the room and only have 4 people born in the same month. (Their birthdays would be distributed so that 4 were born in each month.)

5 in a month

Adding one more person will guarantee that there will be 5 birthdays in one month.

You need to have 49 people in the room to ensure 5 are born in the same month.

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answered
User Rmalchow
by
8.6k points

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