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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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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
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