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There are 35 applicants applying for the position. 20 of them have experience, 1
There are 35 applicants applying for the position. 20 of them have experience, 1
游客
2025-02-23
23
管理
问题
There are 35 applicants applying for the position. 20 of them have experience, 13 of them are older than 25 years old, and 5 have no experience and are younger than 25 years old. How many of the applicants have experience and older than 25 years old?
选项
A、7
B、12
C、5
D、4
E、3
答案
E
解析
假设集合A为有工作经验的人,那么A=20,假设集合B为大于25岁的人,那么B=13,小于25岁并且没有工作经验的人用集合N=5表示,代入公式得到:35=20+13-O+5,因此O=3,选择E。
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