求助，谢谢各位

joyous314 · 发表于 2011-2-7 22:38:28

Fact:Asthma, a bronchial condition, an allergic inflammation of the nasal passages, is an ailment as severe as hay fever is.Fact:Over 95 percent of people who have asthma also suffer from hay fever.
If the information given is as facts above is true, which of the following must also be true?

A.Hay fever is a prerequisite for the development of asthma.
B.Asthma is a prerequisite for the development of hay fever.
C.Those who have fever will never have asthma in the future.
D.The number of people who have both of these ailments is greater than the number of people who have simply one of then.
E.The percentage of people suffering from both hay fever and asthma may be lower than 95 percent.

答案：E
个人觉得D选项也没有问题，选择E仅是因为其出错概率更小吗？谢谢各位高人的解答

dolcehide · 发表于 2011-2-7 23:23:37

假设患asthma的人有100个，那么其中95+的人同时有hay fever。当有大于95+的人单独患hay fever，D项就不成立。题目要求是must be true。。。

joyous314 · 发表于 2011-2-8 18:28:08

哦，就是说同时患H和A的人不一定比单独患H的人多，所以D选项不正确？不知道我这样理解对不对哈，呵呵，谢谢！

求助，谢谢各位

所属分类: GMAT考试

正在浏览此版块的会员 ()