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标题: gwd 2-40 新问题 [打印本页]
作者: lydiadanlee    时间: 2007-11-9 09:29
标题: gwd 2-40 新问题

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

 

       Fact:     

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.

Answer: AE

 people who have asthma also suffer from hay fever.

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.

Answer: AE

 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.

Answer: E

此题中的Over 95 percent of 中的 over是超过的含义吗？

如果是超过，那么假设得A病的人有100，同时得两种病的人应该超过95.。。虽然得fever的人应该多于得a的人。。。是由于这里是 much less than 才有百分比低于95%的吗？

作者: Fadaway    时间: 2008-2-27 00:28
注意看题：
条件1：Ashma比Hay Fever得的人少的多
条件2：得Ashma的人超过95%得Hay Fever

E:得Hay Fever的人里同时又得Ashma的少过95%。

所有答案里这个是唯一可能的。
作者: 双鱼游    时间: 2010-9-20 11:28
we know more people have hay fever than asthma

so let us take the worst case
A = 100 people
H = 101 people

we also know that out of 100 people with asthma 95 have hay fever so teh percentage in choice E is

95/101 which is qlways less than 95% for the worst case.
作者: ssyy23    时间: 2011-8-13 19:14
不懂啊，牛牛讲细点
作者: one1day    时间: 2011-9-6 12:28
A=B，无关
C.Those who have neither hay fever nor asthma comprise less than 5 percent of the total population【population错】

D.The number of people who have both of these ailments is greater than the number of people who have only one of them【the number错，题目说的是percent】

E花个韦恩图，

中间的交集X是asthma的95%，那么x占hay fever这边的比例是多少？
不知道，e说比例低于95%，有这种可能。
作者: 372913565    时间: 2013-7-13 23:44
one1day 发表于 2011-9-6 12:28
A=B，无关C.Those who have neither hay fever nor asthma comprise less than 5 percent of the total pop ...

画图果然很有用
作者: pilixiyuan    时间: 2019-1-8 09:30
双鱼游 发表于 2010-9-20 11:28
we know more people have hay fever than asthma so let us take the worst case A = 100 people H = 101  ...

同意！               



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