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[Problem Solving]

试题详情

题目:

In a survey of students, each student selected from a list of 12 songs the 2 songs that the student liked best. If each song was selected 4 times, how many students were surveyed?

选项:

A、96
B、48
C、32
D、24
E、18

答案:

D

提问:

@徐小梅,老师,这一题不懂…… 用排列组合做吗?

解答:

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阅读1234
解答: 徐小梅

提问:

@徐小梅,老师,这一题不懂…… 用排列组合做吗?

解答:

点赞0
阅读1235
解答: 徐小梅老师

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