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What is an easy way to remember the difference between nCr and nPr?
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What is an easy way to remember the difference between nCr and nPr?

- nCr is the combination while nPr is the permutation. The easy way to remember the difference between nCr and nPr is their formula. The formula for the combination is n!/r! (n - r)! while for the permutation is n!/(n - r)!. Combination is the arrangements of objects in which order does not matter. Permutation is the arrangements of objects in which order matters.

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