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题库 / GMATLA-CR-10
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?
Hay fever is a prerequisite for the development of asthma.
Asthma is a prerequisite for the development of hay fever.
Those who have neither hay fever nor asthma comprise less than 5 percent of the total population.
The number of people who have both of these ailments is greater than the number of people who have only one of them.
The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
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我觉的这是一个数学题！但是私以为韦恩图不是很好。用hf/a大于95%。E就是a/hf小于1/95%
太狡猾了
画个图就能解决了
# people who have A also suffer from F = # people who suffer from F also have A. 因为 A is much less common than F, 因此 the percentage of people who suffer from F also have A 肯定小于95%.
who have asthma also suffer from hay fever.
CD解释；演绎题，画个韦恩图，大圈和小圈交叉，大圈是 hay fever，小圈Asthma，是交叉范围是小圈的95%，E就是那个交叉范围占大圈的
講真是不需要韋恩圖的。
可以直接使用排除法。
選項A和B必錯，因為根據題目條件，任意一方都不可能是對方的prerequisite
選項C，錯，因為不清楚兩種病在ttl ppl內的比例，所以無法判斷。
選項D，錯，因為題目明確說了#As
这题需要画韦恩图。1是的A的病人，0.95是A中又得H的病人。而且 A is less common illness。因此的H的人数大于A，得E
怎么做的啊。求解
我也是画了韦恩图。呃 生生做成了数学
韦恩图正解了！！机智
这题太狡猾了……
前四个都不对，靠排除法选了E，果然E得靠韦恩图才能懂，楼上机智了
画了韦恩图才做出来，绕迷糊了。