In a survey of students,each student selected from a list of 12 songs the 2 songs that the student l

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?

答案

一群学生,每人从12首歌的列表中选出2首最喜欢的,如果每首歌被选择了4次,学生应该有多少人?
12X4=48（次） 每人选2首,共计48/2=24（人）