Permutation Calculator
Math CalculatorsCalculate the number of ways to arrange a subset of items.
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Permutations (nPr)
About This Tool
Free online Permutation Calculator (nPr). Calculate the number of possible arrangements of r objects from a set of n objects where the order of arrangement matters.
Frequently Asked Questions
A permutation is a mathematical calculation of the number of ways a particular set can be arranged, where the order of the arrangement matters.
The formula for permutations is nPr = n! / (n - r)!, where n is the total number of items and r is the number of items being arranged.
In permutations, the order of items is essential (like a lock code). In combinations, the order does not matter (like a fruit salad).
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