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Asked by amal

find the number of permutations of 5 out of 9. then find 6 out of 6
17 years ago

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Answered by Damon
n!/(n-r)! = 9!/4! = 9*8*7*6*5 = 15120

6!/0! = 6*5*4*3*2 = 720
because 0! is defined as 1
17 years ago
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find the number of permutations of 5 out of 9. then find 6 out of 6

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