# math

How many arrangements can be made using 4 letters of the word HYPERBOLAS if no letter is to be used more than once?

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2. 👎 1
3. 👁 2,202
1. permutations of four of 10
n!/(n-r)!
10!/6!
10*9*8*7
5040

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2. 80

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2. 👎 0

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