2. 职称英语
  3. 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2024-01-12  55
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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