求解 GWD-18-Q15

brenda47

GWD-18-Q15
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

答案选E
E选项是不是说： 在得hay fever的人里面，既有得hay fever又有得asthma的人数占总的hay fever人数是小于95percent。
这道题应该怎么理解呢

happyself

其实就是求交集。这题貌似CD上以前以前有帖子的。交集占小集合的95%+，占大得多的集合（much more common）的话就会小于95%了。韦恩图

brenda47

哦~~~那就对了 谢啦谢啦