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6 April, 13:12

Find the number of permutations of the first 9 letters of the alphabet taking 5 letters

at a time.

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  1. 6 April, 13:35
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    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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