Question 441762: how many ways can 5 sopranos and 4 altos be chosen for the university chorus from 7 sopranos and 9 altos? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! how many ways can 5 sopranos and 4 altos be chosen for the university chorus from 7 sopranos and 9 altos?
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# of ways to choose 5 sopranos: 7C5 = 7C2 = (7*6)/(1*2) = 21
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# of ways to choose 4 altos: 9C4 = (9*8*7*6)(1*2*3*4) = 126
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# of ways to choose 5 s and 4 a = 21*126 = 2646
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Cheers,
Stan H.
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