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OpenStudy (anonymous):
What is the value of 10C7? A.12 B.720 C.5040 D.604,800
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OpenStudy (anonymous):
10C7=10C3=(10*9*8)/6=12
OpenStudy (anonymous):
120
OpenStudy (anonymous):
ok thanks i messed up 120 is the first one thanks :)
OpenStudy (anonymous):
because nCr=nC(n-r)...i used this property ,do you get it???
OpenStudy (anonymous):
ya i think so thanks
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