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Pre-Algebra
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OpenStudy (anonymous):
How do you simplify combinations?
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OpenStudy (callisto):
\[nCr=\frac{n!}{(n-r)!r!}\]
OpenStudy (anonymous):
Uh, yeah. I totally get that.
OpenStudy (anonymous):
Actually, I think I do. Thanks.
OpenStudy (callisto):
Welcome :)
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