返回列表 发帖

求助??

set A,B,C have soem elements in common. if 16 elements are in both A and B, 17 elements are in both A and C, and 18 elements are in both B and C, how many elements do all three of the sets A, B, and C have in common?

1) of the 16 elements that are in both A and B, 9 elements are also in C

2) A has 25 elements, B has 30 elements, and C has 35 elements.

the answer is A. why?

收藏 分享

条件(1)不就给出了ABC共有的9个元素吗

TOP

I got it ,thanks !!!!

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看