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schedule

by daretodream » Fri Feb 19, 2010 3:27 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 ajith » Fri Feb 19, 2010 4:00 am
daretodream 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
10C3*3! = [spoiler]10*9*8 = 720, D[/spoiler]
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by harsh.champ » Fri Feb 19, 2010 4:01 am
daretodream 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
Since,we are taking schedule hence permutations would also be considered.(In addition to selections)

So,the answer would be [spoiler]10P3 = 720 =D[/spoiler]
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