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标题: GWD9-Q13 [打印本页]

作者: jingjane222 时间: 2010-5-14 22:10 标题: GWD9-Q13

GWD-9-Q13:E

Fact: Asthma, a bronchial condition, is much less common ailment than hay fever, an allergic inflammation of the nasal passages.

Fact: over 95 percent of people who have asthma also suffer from hay fever.

If the information given 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 neither hay fever nor asthma comprise less than 5 percent of the total population

D.
The number of people who have both of these ailments is greater than the number of people who have only one of them

E.
The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.

答案E,没看明白E是什么与什么进行比较,请高人指点,拜谢

作者: nieyuhang 时间: 2010-5-15 08:31

很有趣的GWD题，只是换个角度的PERCENTAGE

画两个圆，一个是asthma,一个是hay fevor,前者的圆远远小于后者，而且他们的交集部分占asthma的超过95%。E说的95%是指交集部分相对于hay fevor的大圆（分子是交集，分母是hay fevor），因为hat fevor的圆远远大于asthma的元，所以交集部分相对于hay fevor就小于95%

作者: jingjane222 时间: 2010-5-15 21:54

谢谢,解释的很清楚,方法很有效,视角很独特!

作者: lilingfeng 时间: 2010-5-16 10:02

就在找这题现在明白啦不愧是牛人的解释。。

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