emilybb195
emilybb195
15-03-2017
Mathematics
contestada
someone please answer !!!!
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Acebrainer
Acebrainer
15-03-2017
The answer is C
By the way, that expression means "n choose k". Hope I helped!
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linhnguyen
linhnguyen
15-03-2017
The answer is c .I hope my answer right
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