lexinerd lexinerd
  • 12-06-2014
  • Mathematics
contestada

How many ways can you choose a set of 9 pencils from a selection of 10?

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konrad509
konrad509 konrad509
  • 12-06-2014
[tex]{10 \choose 9} =\frac{10!}{9!1!}=10[/tex]
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