Statistics

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I am stuck on this probability question:
Any suggestions of where to start would be great!! Thanks!

Given 20 people, what is the probability that among the 12 months
in the year there are 2 months containing exactly 4 birthdays each and there are 6
months containing exactly 2 birthdays each? Assume that each month is equally
likely and birthdays are independent.

  • Statistics -

    PLEASE HELP :)

  • Statistics -

    never mind got it

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