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annaamarylkri
annaamarylkri annaamarylkri
  • 30-06-2016
  • Mathematics
Answered

ten runners are in a race. how many different ways can they finish in 1st, 2nd and 3rd place?

Verified Answer :

toporc
toporc toporc
  • 30-06-2016

The order of selection matters, therefore we need to find permutations:
The number of ways is found from 10P3.
\(10P3=\frac{10!}{7!}=10\times9\times8=720\ ways\)

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