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标题: 求助GWD_TN24-7-Q13 [打印本页]

作者: kenny2524289 时间: 2011-11-26 18:06
标题: 求助GWD_TN24-7-Q13

GWD-9-Q13:

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.

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为什么选E？我选的是D

作者: kenny2524289 时间: 2011-11-26 18:35
来人吧...

作者: kidvii 时间: 2011-11-26 18:43
因为既有asthma 又有 hay fever的人数是固定的。

然后asthma much less common than hay fever

那么，在一个既定的人群中，hay fever的人数多。

作为百分比的基数，自然冲淡了 95%

作者: kenny2524289 时间: 2011-11-26 20:08

因为既有asthma 又有 hay fever的人数是固定的。

然后asthma much less common than hay fever

那么，在一个既定的人群中，hay fever的人数多。

作为百分比的基数，自然冲淡了 95%

-- by 会员 kidvii (2011/11/26 18:43:19)

我假设人数总共是150..A有100人.H有120人..A中患有H的over95假设有98人..此时98/120<95%..
但是假如H有101人..那么此时98/101>95%.. 由于本题是must be true题所以就很纠结..
不知道是不是我的理解有错误呢....

作者: kenny2524289 时间: 2011-11-26 20:16
不知道回复还是引用你能看得到..
所以就各一次吧..

作者: kenny2524289 时间: 2011-11-26 21:02
求解答..

作者: kenny2524289 时间: 2011-11-26 21:51
明白了..封贴

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