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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keely1975 keely1975

03-02-2018
Mathematics

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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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teamath333 teamath333 · Answer 1 · 2018-02-09T15:26:40+01:00

teamath333 teamath333

09-02-2018

If the order of the selection is important we will apply the Arrangements formula [tex] A_{n} ^{k}= \frac{n!}{(n-k)!} [/tex].
In our case we will have [tex]A_{9}^{5}= \frac{9!}{4!} =5*6*7*8*9=15120.[/tex]

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