Permutation and Combination Calculator

Calculate nPr (permutations) and nCr (combinations) for any values of n and r.

🔢 Permutation & Combination Calculator

nPr = n!/(n−r)! | nCr = n!/[r!(n−r)!]

n (total items)

r (items chosen)

permutation combination nPr nCr factorial probability math statistics counting

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