Question 550045
 If there are four red, five green and six yellow apples, how many selections of nine apples are possible if three red apples, three green apples and three yellow apples are to be selected?
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# of ways to pick 3 red: 4C3 = 4
# of ways to pick 3 green: 5C3 = 5C2 = 10
# of ways to pick 3 yellow: 6C3 = 20
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Total # of selections: 4*10*20 = 800
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Cheers,
Stan H.