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There are 6 runners in a race. How many different permutations are possible for the order in which the runners finish?

Answer :

The number of different permutations for the places in which the 6 runners can finish is 720.

To calculate the number of permutations of 6 distinct objects. A permutation is an arrangement of items in a specific order, and the formula to find the total number of permutations of 'n' distinct objects is given by n!. Here, n=6 since there are 6 runners.

The formula for permutations is:

[tex]n! = n \times (n-1) \times (n-2) \times \cdots \times 1[/tex]

For 6 runners, this would be:

[tex]6! = 6 \times 5 \times 4 \times 3 \times 2 \times 1[/tex]

Calculating this step-by-step:

  • [tex]6 \times 5 = 30[/tex]
  • [tex]30 \times 4 = 120[/tex]
  • [tex]120 \times 3 = 360[/tex]
  • [tex]360 \times 2 = 720[/tex]
  • [tex]720 \times 1 = 720[/tex]

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