Question 428991
Rachel just received her transcript showing her grades in five academic classes. In how many ways could she have earned "A's" in at least three of her classes?
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Ans: 
5C3 + 5C4+ 5C5 
5C3 = (5*4)/(1*2) = 10 ways
(5C4) = 5
(5C5) = 1
Total = 10+5+1 = 16
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Cheers,
Stan H.
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