再请教一道！！谢谢NN们！

louis_huang

Of the people who attended a workshop, 60 percent were teachers and some of the teachers were teachers of language arts.What percent of the people who attended the workshop were teachers of language arts?
(1)200 people attended the workshop.
(2)72 of the teachers who attended the workshop were not teachers of language arts.
答案是C。但我认为是E啊，告诉200个人，可推出120个是老师，告诉72个不是教语言的，但又没说老师就两种一种教语言，一种不教，所以不能推出多少人教语言。大家讨论讨论！

louis_huang

LS，我还是不明白some of the teachers were teachers of language arts，就可推出老师就是两种，一种教语言，一种不教？如你所说，剩下48人，那么有可能其中20人教数学，28人教语言，那么就不是你这个答案了。我之前大概表达不清楚。再讨论一下？

louis_huang

有没有NN指点一下?

louis_huang

谢谢，我想的太复杂了。。