ChaseDream
搜索
返回列表 发新帖
查看: 964|回复: 1
打印 上一主题 下一主题

请大虾帮看个题

[复制链接]
跳转到指定楼层
楼主
发表于 2013-7-8 08:42:47 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Fact: Asthma, a bronchial condition, is muchless common ailment than hay fever, an allergic inflammation of the nasalpassages.
Fact: over 95 percent of people who haveasthma also suffer from hay fever.
If the information given as facts above istrue, which of the following must also be true?
A.   Hayfever is a prerequisite for the development of asthma
B.   Asthmais a prerequisite for the development of hay fever
C.   Thosewho have neither hay fever nor asthma comprise less than 5 percent of the totalpopulation
D.   Thenumber of people who have both of these ailments is greater than the number ofpeople who have only one of them
E.    Thepercentage of people suffering from hay fever who also have asthma is lower than95 percent.


答案是e,感觉智商被碾压了。
收藏收藏 收藏收藏
沙发
发表于 2013-7-8 10:27:15 | 只看该作者
Fact:asthma没hay fever常见,有asthma的超过95都有hay fever。
假设同时患asthma和hay fever人数为95,那么患asthma的人数为95-99。
hay fever患者理论上至少100,如果考虑much less common,那么应该远大于100。
95/一个远大于100的数<0.95
您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

手机版|ChaseDream|GMT+8, 2024-12-29 10:08
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2023 ChaseDream.com. All Rights Reserved.

返回顶部