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Old 07-29-2007   #4
qwert
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X = number of red balls drawnP(X=0) = C(5,3) / C(9,3)P(X=1) =[ C(4,1) * C(5,2) ] / C(9,3)P(X=2) =[ C(4,2) * C(5,1) ] / C(9,3)P(X=3) = C(4,3) / C(9,3)































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