Permutation and Combination Calculator

Solve Permutation and Combination with a transparent method.

How are selections counted?Choose whether order matters and whether an item may be selected more than once.

3 options

Total Amount in a Set (n)

Amount in each Sub-Set (r)

COMBINATIONS120

Exact integer result computed without floating-point rounding.

Estimate based on the values shown

Formula checkedUses nCr when order does not matter, nPr for ordered selections without reuse, and n^r for ordered selections with repetition.

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