Other way of solving:
choosing 3 movies out of 10 can be done in 10c3 ways = 120
the selected 3 movies can be watched in 3! ways.
so, selecting AND watching can be done in 120*3! ways = 720
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
choosing 3 movies out of 10 can be done in 10c3 ways = 120
the selected 3 movies can be watched in 3! ways.
so, selecting AND watching can be done in 120*3! ways = 720
Bunuel 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
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