Ten runners joine a race .in how many possible ways can they be arranged as first devond and third placers?

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asked Feb 9, 2017 125k views

1 Answer

Sunghee Yun · Answer 1 · 2017-02-16T00:27:05+0000

10P3 -> 10!/7!

=720

OR

There are ten possible runners for first place, then nine for second place, and eight for third place, therefore:

10*9*8 = 720

Ten runners joine a race .in how many possible ways can they be arranged as first devond and third placers?

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