求问一道GWD

noella · 发表于 2011-8-26 23:42:15

Favorable   Unfavorable   Not Sure
Candidate M   40   20   40
Candidate N   30   35   35

The table above shows the results of a survey of 100 voters each responded “favorable” or “unfavorable” or “not sure” when asked about their impressions of candidate M and of candidate N. What was the number of voters who responded “favorable” for both candidates?
(1)   The number of voters who did not respond “favorable” for either candidate was 40.
(2)    The number of voters who responded “unfavorable” for both candidates was 10.
为什么不选E？

wyw1018 · 发表于 2011-8-27 03:26:19

条件1，得出投favorable的人数=100-40=60，那么for both的人数=40+30-60=10
条件2，得出投favorable和not sure的人数为100-10=90，但无法知道各自单独的人数

因此选a

noella · 发表于 2011-8-30 18:04:51

谢谢~集合运算什么的

求问一道GWD

所属分类: GMAT考试

正在浏览此版块的会员 ()

浏览过的版块