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题目内容双击单词支持查询和收藏哦～
A group of people attend an activity. 40 per cent of them are teachers, while 80 per cent of all teachers have master`s degree.
Quantity A
The proportion of teachers who don`t have master`s degree among all teachers
Quantity B
$$\frac{1}{5}$$
C显示答案
以上解析由 考满分老师提供。
