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8 August, 08:03

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

24

12

4

+3
Answers (1)
  1. 8 August, 10:26
    0
    The correct answer is 24

    You have to apply factorials here and formulas. You have 4 letters which means that your n=4, and you have 3 objects at a time which, means that you have 4 different groups of combinations with 6 permutations in each due to the 3! factorial. 6 x 4 is 24.
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