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标题: 雪地请教OG-171 [打印本页]

作者: dxwei2008 时间: 2003-12-8 21:45
标题: 雪地请教OG-171
171. A recent report determined that although only three percent of drivers on Maryland highways equipped their vehicles with radar detectors, thirty-three percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.
The conclusion drawn above depends on which of the following assumptions?
(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.
(B) Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.
(C) The number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehicles that were equipped with radar detectors.
(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.
(E) Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.

正确答案是B，可是我怎么也想不通。高手请指点！

作者: snow_mountain 时间: 2003-12-8 23:44
og 对这道题的英文解释还是挺清晰的。你看看吧。如果还是不明白在跟你解释。

作者: tyghbn 时间: 2004-5-6 11:08

this one clearly posted some doubts on OG's answer. and I have hard time to understand what the explanation had to say. B doesn't even mention the "radar detector". how does that supposed to fit the gap? I think A is a more GMATize answer.

NN's comments are welcomed...

作者: snowjing 时间: 2005-7-27 00:05
http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=40455

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