Permutations and Combinations
engineering fundamentals Permutation and Combination
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Permutations

A permutation of n taken m at a time is defined as an ordered selection of m out of the n items. The total number of all the possible permutations is denoted as:

Combinations

A combination of n taken m at a time is defined as a selection of m out of the n items without regard to the order. The total number of all the possible combinations is denoted as:

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