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25-04-2020
Mathematics

contestada

Find the number of permutations of the first 9 letters of the alphabet taking 5 letters
at a time.

Respuesta :

26-04-2020

We have 9 choices for the first letter, 8 for the second, 7 for the third, 6 for the fourth and 5 for the fifth,

n = 9×8×7×6×5 = 15,120

Answer: 15,120

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