[求助]求教两道OG黄皮题目，以防大家都将眼球盯着奥运会标题手动加长

kemo1293

OG11黄皮

81.A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 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.

这题看了两遍解释都不知道个所以然，感觉结论和假设根本没什么联系，也许是自己境界不够。。。

Roland: The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed.

Sharon: But a normal, moderate level of unemployment is 5 percent, with one out of 20 workers unemployed. So at any given time if a person knows approximately 50 workers, one or more will very likely be unemployed.

77.   Sharon’s argument relies on the assumption that

(A) normal levels of unemployment are rarely exceeded

(B) unemployment is not normally concentrated in geographically isolated segments of the population

(C) the number of people who each know someone who is unemployed is always higher than 90 percent of the population

(D) Roland is not consciously distorting the statistics he presents

(E) knowledge that a personal acquaintance is unemployed generates more fear of losing one’s job than does knowledge of unemployment statistics

这个想来想去实在不知道原文中的 if a person knows approximately 50 workers, one or more will very likely be unemployed.是怎么得出来的。。。如果失业率是5％的话，不是应该5％·50吗？为什么是one啊。。。

各位GGJJ帮忙看看吧，麻烦了~

kemo1293

自己顶下，大大们都哪里去了。。。

紫苏

81题如果通过33%就可以推出结论，那么说明那些没有被贴到超速罚单而又确实超速的的司机很少，因为如果有很多人超速但是没有被贴到罚单的话这个结论就会被削弱了

iamwuyan

81题, 3%的司机装雷达+33%给贴了罚单的车装有雷达===>结论说明有雷达的车平时更容易超速, 这里能发现逻辑有一个跳跃, 即作者认为贴了罚单就是平时容易超速(因为有时候平时常超速的人并不一定会给贴罚单)

77题我当时好像是用排除法做的, 这个B选项想想没什么错, 但是看到他我不一定第一时间敢选