OG11-黃DS74 college graduates=master ?

Kath1985 · 发表于 2010-3-25 19:34:49

50 % of the employees are college graduates and 60 percent of the employees are
over 40 years old. If 30 % of those over 40 have master's degrees, how many of the
employees over 40 have master's degrees ?
1. Exactly 100 of the employees are college graduates
2. of the employees 40 years old or less, 25 % have master's degrees.
答案A 想問
1我畫的圖都不對請問該怎麼改才符合題目描述的集合圖 ?
2 college graduates 就是指 master's degrees 嗎 ?
[attachimg=720,450]76322[/attachimg]

nycxiaoqiu · 发表于 2010-3-26 02:05:43

两张都不是,college graduate 包括了master degree但还有部分不是..

Kath1985 · 发表于 2010-3-29 21:35:15

先感謝 nycxiaoqiu 但仍有疑問
"college graduate 包括了master degree但还有部分不是" 看不懂意思是指 college graduate是master 對吧 ?.

Kath1985 · 发表于 2010-3-30 20:26:19

OG11-黃DS74 college graduates=master ?

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