Pigeonhole principle

How many people among 1000 are born in same month? Use pigeonhole principle
If you want help, you need to show where you need help! Please show whatever work you have tried, and ask specific questions about it:


I would first want to know what the question means. Is it asking for a maximum or minimum, perhaps? Or just the average? Did you quote the entire problem, or did you omit some details?
 
How many people among 1000 are born in same month? Use pigeonhole principle
How many people you have to choose - so that -

at least two of those will have same birth month?​

Now think.....

Please show us what you have tried and exactly where you are stuck.

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