[問題]GWD17 Q19

[amyliang]

Of the people who attended a workshop, 60% were teachers and some of the teachers were teachers of language arts. What % of the people who attended the workshop were teachers of language arts?
(1) 200 people attended the workshop
(2) 72 of teachers who attended the workshop were not teachers of language arts.

The answer is C

My answer is E.
First, (1) is not sufficient
(2) is also not sufficient becuase you are not only arts teachers in this workshop. It may have other teachers, such as Math or English teacher. Yet the answer is C. Could you please tell me how to solve this problem.
Thanks

Amy

[cyy]

我覺得C沒錯
由(1)可知一共有120個teachers(200X0.6)
(2)告訴你teachers中有72個"不是"教language arts的
因此剩下的48個(120-72)都是teachers of language arts
48/200=24%
(1)+(2)能成立 answer:C