Companies O and P each have the same number of employees who work the same number of hours per week.

According to records maintained by each company, the employees of Company O had fewer job-related accidents last year than did the employees of Company P. Therefore, employees of Company O are less likely to have job-related accidents than are employees of Company P.

157.

Which of the following, if true, would most weaken the conclusion above?

(A) The employees of Company P lost more time at work due to job-related accidents than did the employees of Company O.

(B) Company P considered more types of accidents to be job-related than did Company O.

(C) The employees of Company P were sick more often than were the employees of Company O.

(D) Several employees of Company O each had more than one job-related accident.

(E) The majority of job-related accidents at Company O involved a single machine.

B is the best answer.

The data used to support the conclusion come from the companies’ own records. Since, however, choice B indicates that, as compared with Company O, Company P tends to overstate the number of job-related accidents, choice B weakens the conclusion drawn and is the best answer.

1Choice A does not weaken the conclusion, but is simply a consequence that would be expected given the data. 2The relevance of employees’sicknesses (choice C) cannot be assessed without information about the links, if any, between sickness and job-related accidents. 3Choices D and E both give reasons for predicting a smaller likelihood that any arbitrary employee of Company O will have a job-related accident, and thus support the conclusion.

不明白关于D、E的解释？牛牛指教！谢谢！

感觉d.e都是无关选项怎么是支持结论的呢,不明白

根据og解释理解是涉及出事故的工人越少和机器越少,就表明工人出事故的可能性越小,不知道这样理解对不对

我也有同样的问题，请NN指教。

D和E对原题的结论是有明显的支持作用。

D选项可以这样来解：
比如说，O公司总体员工的素质都相当好、从来不犯错误（就象我们这类～～），只有一个“捣蛋鬼”－－他每天上班就会捣蛋、制造accident。这样，去年一年下来，O公司所有的accident都是那个“捣蛋鬼”干的。而P公司呢？总体员工的素质不怎么滴，就当他们全是农民吧－－他们经常犯错误。所以，去年一年下来，P公司累计的accient就比O公司多了。
好了，到了今年，O和P两家公司正好都要派人出差，O公司正好把那个“捣蛋鬼”派出去，派到西伯利亚去考察；而P公司也派了一个农民去那里测量西北风～～现在，我们再来看看两家公司的局势：O公司剩下的员工就全是优秀的员工了－－他们从来不犯错误；而P公司剩下的还是一帮农民－－他们还是会经常犯错误。－－》所以就支持了题中的结论。

同样的道理，也可以解释E选项，因为D和E在逻辑上来说，本质是一样的（大家要不要自己试着解释一下？～～）。

没错。如果真要详细计算的话，会涉及到“概率论”方面的问题。有兴趣的话可以找本初等数学的书看看～～

橙子兄弟真是幽默啊~~喜欢看你的回帖, 不知道你现在杀G成功没有,是不是还在CD上, 若在的话,请多帮我们这些菜菜解答点问题, 让我们在复习GMAT的枯燥乏味之余也乐呵乐呵

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