in Graph Theory
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In a village there are equal  no of boys and girls of marriageable age.Each boy dates a certain no. of girls and each girl dates a  certain number of boys,under what condition is it possible that every girl and boy  gets married to one of their dates?
in Graph Theory
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Assume there are n boys and n girls, each boy and girl is dating k persons so ans is (k/n)^n

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can u pls expalin..how??
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