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Five people want to rent the last two copies of a movie. How many ways can these five people rent the two movies?

单选题
2022-05-13 03:48
A、10
B、9
C、8
D、7
E、6
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正确答案
A

试题解析

Let A, B, C, D, and E represent the five people who want to rent the two movies. List the different pairs of people to find there are 10 pairs {AB, AC, AD, AE, BC, BD, BE, CD, CE, DE}.

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