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

10

B

9

C

8

D

7

E

6


参考答案

参考解析
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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