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Mathematics 11 Online
OpenStudy (anonymous):

Inside a large metal-wire cage, ping pong balls numbered from 1 to 49 are being mixed by a state employee. If five balls are chosen randomly, how many ways can this be done?

OpenStudy (anonymous):

\[\binom{49}{5}\]

OpenStudy (anonymous):

http://www.wolframalpha.com/input/?i=49+choose+5

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