本月数学寂静53题

ningleena

53、DS：in an organization, 60% people engaged in research, 54% people engaged in counseling, 30% engaged in teaching. Question: what percent of people in organization engaged in at least two fields?
1) half of the people who engaged in teaching attend at least two field
2) 20% people of whole organization who engaged in at least two field do not engaged in teaching
貌似是这样30% in teaching绝对肯定 两个条件也肯定，答案我好像选C，但不知对不对。

机经作者刚更正了答案，正确答案为E, 为什么呢，哪位朋友可以具体解释下呢？

melodyflying

我选e

题目又没说整个organization里除了列举的三种情况

还有没有别的area来engage

dylan_cd

感觉是C啊，怎么成E了？