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Mathematics 24 Online
geerky42 (geerky42):

The local YMCA has footballs, basketballs, volleyballs, tennis balls, and soccer balls in their store room. They only check out three balls from the store room each day to play with. How many different sets of three balls can they check out?

OpenStudy (raden):

choice 3 from 5, it means 5C3 = 5!/(5-3)!3! = ...

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