OG12 78和107~~求救高人

mabelren · 发表于 2010-9-23 22:31:21

78. A recent report determined that although only 3% of drivers on M highway equipped their vehicles with radar detectors,33% 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?

答案是
B. Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are ticketed.

我想问为什么D不对
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.

这两个意思不都是一个司机被罚好几回么？

107. Last year all refuse collected by Shelbyville city services wasincinerated. This incineration generated a large quantity of residualash. In order to reduce the amount of residual ash Shelbyvillegenerates this year to half of last year’s total, the city has revampedits collection program. This year city services will separate forrecycling enough refuse to reduce the number of truckloads of refuse tobe incinerated to half of last year’s number.

Which of the following is required for the revamped collection program to achieve its aim?

(A) This year, no materials that city services could separate for recycling will be incinerated.
(B) Separating recyclable materials from materials to be incineratedwill cost Shelbyville less than half what it cost last year to disposeof the residual ash.
(C) Refuse collected by city services will contain a larger proportion of recyclable materials this year than it did last year.
(D) The refuse incinerated this year will generate no more residual ashper truckload incinerated than did the refuse incinerated last year.
(E) The total quantity of refuse collected by Shelbyville city servicesthis year will be no greater than that collected last year.
答案

我想问为什么 E 不对
要是总量增加很多，就算只有一半被烧，还是会产生很多烟啊~~也有可能比去年全部都被烧产生的烟多啊~~

OG解释：This is not a requirement because even if the city collects more reduse this year, it couls still cut in half the amount of residual ash by cutting in half the number of truckloads going to the incinerator.

aomeisoft7 · 发表于 2010-9-24 00:00:10

A recent report determined that although only 3% of drivers on M highway equipped their vehicles with radar detectors,33% 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.
33%被罚超速的车装有radar detector > 推出装有radar 的车更容易超速
即：罚款数高 > 超速概率高

The conclusion drawn above depends on which of the following assumptions?
求假设

B. Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are ticketed.（应该是who are not ticked,掉了一个not呵呵）
比起没有罚款的车，被罚款超速的车超速的概率越大（即超速次数越多，被罚的概率越大）
取非：罚款和车超速概率无关，很有可能装了radar的车更容易被抓（可能：超速1次就被抓到罚一次，而没装radar的人超速10次才被抓到罚一次。那么就不能由罚款数目推测车超速概率，削弱了结论）

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.
很多超速的车罚款了不止一次（这个没有讲到罚款和车超速的概率的关系）

aomeisoft7 · 发表于 2010-9-24 00:16:33

This year city services will separate forrecycling enough refuse to reduce the number of truckloads of refuse tobe incinerated to half of last year’s number.
结论是：卡车数目减一半 > 所以垃圾总数少一半
很明显逻辑漏洞是：每个卡车装载的数量是不是保持不变，如果每车装了以前的两倍，垃圾总数也没变

(E) The total quantity of refuse collected by Shelbyville city servicesthis year will be no greater than that collected last year.
如果垃圾总数比以前少（没说少多少），的确污染是会变少
但是题目结论的逻辑是要少half，所以这个选项没有修补作用

yxz2289 · 发表于 2010-11-20 16:25:54

A recent report determined that although only 3% of drivers on M highway equipped their vehicles with radar detectors,33% 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.
我觉得可以这么理解，条件是装有雷达的车更容易被罚款，结论是装有雷达的车更容易超速。于是，中间缺少一个环节，即罚款与超速有什么关系呢？
所以需要提出一个假设，被罚款的车更容易超速。得答案B。逻辑关系即A>B>C,而B为假设。

xibao · 发表于 2011-3-26 03:15:51

up我还是理解不了~！！！！！！！！！！！！107题E

recycling refuse也能incinerate吗

本贴相关题目 OG-2017-CR-655 | TN-06-CR-21OG-2017-CR-655 |
OG-2016-CR-114 |
OG-2015-CR-109 |
OG-13-CR-109 |
OG-12-CR-107 |
TN-06-CR-21
... (VALF)

相关帖子

更多相关帖子

OG12 78和107~~求救高人

所属分类: GMAT考试

正在浏览此版块的会员 ()

本贴相关题目 OG-2017-CR-655 | TN-06-CR-21OG-2017-CR-655 | OG-2016-CR-114 | OG-2015-CR-109 | OG-13-CR-109 | OG-12-CR-107 | TN-06-CR-21 ... (VALF)

相关帖子

更多相关帖子

OG12 78和107~~求救高人

所属分类: GMAT考试

正在浏览此版块的会员 ()

本贴相关题目 OG-2017-CR-655 | TN-06-CR-21OG-2017-CR-655 |
OG-2016-CR-114 |
OG-2015-CR-109 |
OG-13-CR-109 |
OG-12-CR-107 |
TN-06-CR-21
... (VALF)