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In how many ways can you select five people from a group of nine if the order of selection is important?
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In how many ways can you select five people from a group of nine if the order of selection is important?

User Hack
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If the order of the selection is important we will apply the Arrangements formula
A_(n) ^(k)= (n!)/((n-k)!).
In our case we will have
A_(9)^(5)= (9!)/(4!) =5*6*7*8*9=15120.
User Prnvbn
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