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LSAT19-CR1-20

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楼主
发表于 2003-12-5 17:18:00 | 只看该作者

LSAT19-CR1-20

20. Students from outside the province of Markland, who in any given academic year pay twice as much tuition each as do students from Markland, had traditionally accounted for at least two-thirds of the enrollment at Central Markland College. Over the past 10 years academic standards at the college have risen and the proportion of students who are not Marklanders has dropped to around 40 percent.

Which one of the following can be properly inferred from the statements above?

(A) If it had not been for the high tuition paid by students from outside Markland, the college could not have improved its academic standards over the past 10 years.

(B) If academic standards had not risen over the past 10 year students who are not Marklanders would still account for at least two-thirds of the college's enrollment.

(C) Over the past 10 year the number of students from Markland increased and the number of students from outside Markland decreased

(D) Over the past 10 years academic standards at Central Markland College have risen by more than academic standards at any other college in Markland.

(E) If the college's per capita revenue from tuition has remained the same tuition fees have increased over the past 10 years.
答案是E,C为何不对呢?
沙发
发表于 2003-12-5 22:10:00 | 只看该作者
只是比例的增减不代表总数的增减。如果你已经知道e为何对了,我也不用多说了。

还是多说几句吧,我不知道这样解释e对不对:设原来的当地人的学费是x,10年后的是y。如果他们的平均费用相等得到:1/3x+2/3x.2=3/5y+2/5y.2. so, x感觉是在做数学啊。我也是刚开始准备gamt的。不知道这样想对不对。
板凳
发表于 2003-12-6 10:27:00 | 只看该作者
well, u assumed the total number has been unchanged! in that case, C is right as well.
地板
发表于 2003-12-6 10:33:00 | 只看该作者
不同意
c应该是错的
很简单一个逻辑,如果总数增加,而该部分的比例下降,你是无法推出该部分的总数也是下降的,可能上升也可能下降
再来个兄弟确认一下!
5#
发表于 2003-12-6 10:47:00 | 只看该作者
感觉应该是E。人均应该跟总数没关系呀。
6#
发表于 2003-12-6 21:31:00 | 只看该作者
呵呵,bryony我是和你一条战线的,当然是选e咯
我那条是写给小鸭和qier看的
你去帮我看看我的那两题
7#
发表于 2003-12-9 05:36:00 | 只看该作者
我想小鸭的意思是把答案C改写为如下条件句:
(C) Over the past 10 year the number of students from Markland increased and the number of students from outside Markland decreased ,if the total numbers of students in the college kept unchanged.

这样只讨论到students numbers,没涉及到fees,应该也没错。

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