This calculation is the number of ways of picking r unordered derived from n possibilities. n = the set size. It is the total number of items in the sample. r = the subset size. It is the number of items chosen from the sample. Only whole positive (integer) numbers are valid. Combinations gives the number of ways a subset of r items can be chosen out of a set of n items. For r <= n, n >= 0, and r >= 0. The combinations formula is (C(n,r) = n! / r! (n - r)!)...

NCR Combinations Calculator

This will calculate the combinations for C(n,r) = n! / r! (n - r)!.

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