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P&C

by armaan700+ » Wed Jan 27, 2010 3:19 am
Greg is renting movies from the video store. He must choose 3 videos from a list of 10 videos and decide in which order to watch them. How many schedules of videos can he create?

A. 30
B. 70
C. 700
D. 720
E. 1000
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by papgust » Wed Jan 27, 2010 3:23 am
IMO D

3 movies to be chosen from 10 movies = 10C3

3! ways in which the 3 movies could be watched. So, 10C3 * 3! = 720
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by thephoenix » Wed Jan 27, 2010 3:29 am
armaan700+ wrote:Greg is renting movies from the video store. He must choose 3 videos from a list of 10 videos and decide in which order to watch them. How many schedules of videos can he create?

A. 30
B. 70
C. 700
D. 720
E. 1000
its 10P3=720
D
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