keely1975 keely1975
  • 03-02-2018
  • Mathematics
contestada

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

Respuesta :

teamath333
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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