gmat 大全（不含OG) test10-15

blancolzk

In Argonia the average rate drivers pay for car accident insurance is regulated to allow insurance companies to make a reasonable profit. Under the regulations, the rate any individual driver pays never depends on the actual distance driven by that driver each year. Therefore, Argonians who drive less than average partially subsidize the insurance of those who drive more than average.
The conclusion above would be properly drawn if it were also true that in Argonia
(A) the average accident insurance rate for all drivers rises whenever a substantial number of new drivers buy insurance
(B) the average cost to insurance companies of insuring drivers who drive less than the annual average is less than the average cost of insuring drivers who drive more than the annual average
(C) the lower the age of a driver, the higher the insurance rate paid by that driver
(D) insurance company profits would rise substantially if drivers were classified in terms of the actual number of miles they drive each year
(E) drivers who have caused insurance companies to pay costly claims generally pay insurance rates that are equal to or lower than those paid by other drivers
给出的答案是C   ，觉得D 才是正确的，有没有牛人给讲解一下.

gwang5

The conclusion above would be properly drawn if it were also true that in Argonia
(A) the average accident insurance rate for all drivers rises whenever a substantial number of new drivers buy insurance
(B) the average cost to insurance companies of insuring drivers who drive less than the annual average is less than the average cost of insuring drivers who drive more than the annual average
(C) the lower the age of a driver, the higher the insurance rate paid by that driver
(D) insurance company profits would rise substantially if drivers were classified in terms of the actual number of miles they drive each year
(E) drivers who have caused insurance companies to pay costly claims generally pay insurance rates that are equal to or lower than those paid by other drivers

C肯定不对啊。岁数和年行驶里程没必然联系。
应该选B。开车少的人出险机会少，保险公司承保他们的成本也就低，完全可以给这些人一个低保费。现在是同一个价格，相当于少开车的人在补贴多开车的人。

chasingM7

BBBBBBbb

含草舵手

the cost of insurance does not depend on the distance a driver drives...meaning that people who drive a lot and people who drive a little still pay the same amount (theoretically, since no other variable is mentioned). Statement B says it costs more to insure those who drive more, yet they are still paying the same per mileage rate. The only way the insurance company can lose money on these customers and remain profitable is if they are making it up somewhere else, in this case by charging those who drive less the same rate. The heavy drivers costs get to remain low because the infrequent drivers are paying much more than they would if the costs were based soley on mileage, meaning they are subsidizing part of the costs for the frequent drivers

zxppx

B选项说明了，保险公司用来保护drive less 司机的成本更低，所以加强结论。注意：不是drivers要付出的成本，而是insurance company要付出的成本！