elizaannettem1230 elizaannettem1230

03-05-2018
Mathematics

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How many permutations exist of the letters a, b, c, d taken four at a time?

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MsEHolt MsEHolt

15-05-2018

There are 24 permutations.

The number of permutations of 4 objects taken 4 at a time is given by
4!/(4-4)! = 4!/0! = 4!/1 = 4! = 24

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