Answer to Question #350409 in Combinatorics | Number Theory for Sam

Combinatorics | Number Theory

Question #350409

Combination formulas

Expert's answer

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

"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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