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OpenStudy (anonymous):
Evaluate 8C4.
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OpenStudy (anonymous):
\[nCr = \frac{n!}{(n - r)! r!}\]\[8C4 = \frac{8!}{(8 - 4)!4!}\]\[8C4 = ?\]
OpenStudy (anonymous):
70 ?
OpenStudy (anonymous):
Yup :)
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