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permutation formula

Permutation Formula

A formula for the number of possible permutations of k objects from a set of n. This is usually written nPk .

 

Formula:

Example:

How many ways can 4 students from a group of 15 be lined up for a photograph?
Answer:

There are 15P4 possible permutations of 4 students from a group of 15.

different lineups

 

See also

Combination formula, factorial

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