Vesiacaronan Vesiacaronan

10-11-2016
Mathematics

contestada

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

Respuesta :

10-11-2016

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

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