数学题求解～

Aimee_728

我觉得应该选c，male＝（15+10）／（16+20），但是答案却是e，这道题是我理解有问题吗？

猪智

have to consider the persons who are members of both the drama and music club, the number of whom are not given. thus, e seems legit.

Aimee_728

猪智 发表于 2015-12-13 15:20
have to consider the persons who are members of both the drama and music club, the number of whom ar ...

这样啊，我懂了，谢谢～