扫描二维码，直接登录
题库 / Prep2007E1-DS-45
How many of the 42 people in a group are employed students?
(1) 29 of the 42 people are employed.
(2) 24 of the 42 people are students.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
{Total} = {Students} + {Employed} - {Both} + {Neither}
我们并不了解｛Neither｝的学生数量，缺少条件无法计算
不应该错！
这种题画四格表会很方便
少了employed和students之间的关系
{Total} = {Students} + {Employed} - {Both} + {Neither}
我们并不了解｛Neither｝的学生数量，缺少条件无法计算
这两个的关系：有可能是独立的，也有可能不独立