prep这道题要用到概率的知识吗？

carolcai · 发表于 2008-7-5 16:21:00

143. 14954-!-item-!-187;#058&010212
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?

(A) 96
(B) 48
(C) 32
(D) 24
(E) 18

shiverson · 发表于 2008-7-5 16:34:00

用不着吧我觉得...所选出来的里面，12首歌各4票，一共48票，每票投两首，24人吧...

prep这道题要用到概率的知识吗？

prep这道题要用到概率的知识吗？

所属分类: GMAT考试

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