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Mathematics 13 Online
OpenStudy (anonymous):

There are 5 Republicans and 8 Democrats on a committee. A sub committee of four is selected at random. What is the probability that all are Republicans, given that at least two are Republicans?

OpenStudy (raden):

just leaving selects 2 of 3 Rep... P(2R's) = 3C2/11C2

OpenStudy (raden):

does that make sense ?

OpenStudy (anonymous):

I tried it but it is not taking it as an answer.

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