magoosh一道比例型题目求解！

irisrebelle · 发表于 2020-10-3 21:30:22

Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?

A.A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.B.No factory worker without a high school diploma has completed the course and earned the certificate.
C.Most of the workers who have earned the certificate are high school graduates.
D.A large proportion of the factory workers have not graduated from high school.
E.Most of the people who take the training course are able to earn the safety certificate.

答案选D，快被这个比例绕晕了，求救！

长丝弓 · 发表于 2020-10-3 22:01:59

我也快被绕晕了，标了颜色，感觉好些。楼主看这些颜色，晕得好点没？
几乎所有有高中学历的工厂雇员，都有工厂安全证书，轻易完成为期8周的培训课程。那些剩下那些一小部分有高中学历却没有工厂安全证书的是因为有晚课不能去上training course。
这个工厂大部分人都没有证书，
结论是大部分（比例很大）工厂工人他们都没从高中毕业。

irisrebelle · 发表于 2020-10-3 22:21:20

长丝弓发表于 2020-10-3 22:01
我也快被绕晕了，标了颜色，感觉好些。楼主看这些颜色，晕得好点没？
几乎所有有高中学历的，都有工厂安全 ...

大概看明白了一点点，如果有高中学历，大多数人都有证书，小部分高中学历且没证书的暂时不去管它（？？）；
这个工厂大部分人没有证书，可以推出大部分人都没从高中毕业。
那为啥不能推出大部分人可能属于有高中学历但有夜间obligation的人？

长丝弓 · 发表于 2020-10-7 22:32:50

irisrebelle 发表于 2020-10-3 22:21
大概看明白了一点点，如果有高中学历，大多数人都有证书，小部分高中学历且没证书的暂时不去管它（？？） ...

楼主，我是这样理解的哈，你看有道理不：几乎所有有高中学历的工厂雇员，都有工厂安全证书。高中学历且没证书的（有夜间obligation的人）占极少数，代表不了大部分的工厂雇员。那么剩下的只有一种情况，就是大部分工厂工人/雇员没从高中毕业。

[逻辑小分队] magoosh一道比例型题目求解！

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