Question #350409

Combination formulas


1
Expert's answer
2022-06-16T05:57:22-0400

A combination is a grouping or subset of items. For a combination, the order does not matters.


C(n,r)= nCr=n!(nr)!r!C(n,r)=~^nC_r=\cfrac {n!}{(n-r)!r!}



n — number of items in set.

r — number of items selected from the set.







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