一道饶的很乱的逻辑 最怕这样的题 求救！！！

lllmmm

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.
答案是B   但是我完全看不懂啊    不理解这题的意思

sdcar2010

http://forum.chasedream.com/GMAT_CR/thread-432803-1-1.html

powers

我来试试

装雷达3%,没装的97%
如果雷达和罚单没有correlation
吃罚单的人群里也应该同样是3%和97%的比例.
可是现在不是,现在是30%和70%的关系,明显雷达和罚单是有关系的.

但是conclusion是怎么总结的?
conclusion并没有说雷达和罚单的关系,而说的是雷达和超速有关.

那么这里的gap就是罚单和超速的关系. B就是连接这两者关系的.

leci

楼上的，进一步问一下
罚单和超速不存在关系不关系的问题吧
罚单不就是超速、超速不就是罚单吗？这需要多余建立关系吗？

我真没想明白，请指教呀，谢谢！

lllmmm

谢谢  2   ，3  楼
另外  4楼的哥们 ，  罚单和超速不是一回事。  罚单不一定超速，超速也不一定罚单，两者是独立的。

powers

谢谢  2   ，3  楼
另外  4楼的哥们 ，  罚单和超速不是一回事。  罚单不一定超速，超速也不一定罚单，两者是独立的。

-- by 会员 lllmmm (2011/4/4 22:55:59)

因为超速吃罚单100%肯定是超速了, 而超速则不一定100%吃罚单
A=>B, 而 B=/=>A

powers

楼上的，进一步问一下
罚单和超速不存在关系不关系的问题吧
罚单不就是超速、超速不就是罚单吗？这需要多余建立关系吗？

我真没想明白，请指教呀，谢谢！

-- by 会员 leci (2011/4/4 19:31:30)

假如B说,超速的人反而不吃罚单,罚单只开给开的慢的人,你认为能推出最后的结论吗?

leci

哈哈，是这个理，谢谢power啊！

powers

哎呀不好意思,这题我刚刚又做了一遍

发现我的解释不对! lz不要被我的胡言论语耽误了.

题眼其实应该是regularly! Gap是频率

ssxxtt27

是这么回事
段落里由被ticketed的车的数据推导出所有车的情况 被ticketed的车只是车的一部分，而结论句里所说的车指的是全部车。
in sum 此题的问题在于：又部分推整体！