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Greg is renting movies from the video store. He must choose 3 videos

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Greg is renting movies from the video store. He must choose 3 videos [#permalink]

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New post 28 Jan 2018, 23:26
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

88% (00:45) correct 12% (00:50) wrong based on 33 sessions

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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
Spoiler: OA

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Re: Greg is renting movies from the video store. He must choose 3 videos [#permalink]

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New post 28 Jan 2018, 23:32
Answer is D.


In this problem along with selection order is important. So, we should use permutation.

(10P3)=10*9*8=720 ways

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Re: Greg is renting movies from the video store. He must choose 3 videos   [#permalink] 28 Jan 2018, 23:32
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