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2016-01-22T14:43:05+05:30

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Committee with at least three girl =( committee with 3 girl + committee with 4 girl )
committee with 3 girl =(15C1)×(10C3) = 15×120 = 1800
committee with 4 girl = (10C4) = 210
so the required number of ways = 1800 +210 = 2010
3 3 3
hope you understand the concept of combination
Thanks al
most welcome :)