Combination Formula
Quiz by Mark Dowell Discutido
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​What is the combination of n objects taken r at a time?
\frac{n!}{r!}
\frac{n!}{\left(n-r\right)!}
\frac{n!}{r!\left(n+r\right)!}
\frac{n!}{r!\left(n-r\right)!}
What is the combination of n objects taken r at a time?
