gwd 29-38

润Z细无声

Q38:

In the past, every ten-percentage-point increase in cigarette prices in the country of Coponia has decreased per capita sales of cigarettes by four percent.  Coponia is about to raise taxes on cigarettes by 9 cents per pack.  The average price of cigarettes in Coponia is and has been for more than a year 90 cents per pack.  So the tax hike stands an excellent chance of reducing per capita sales of cigarettes by four percent.

Which of the following is an assumption on which the argument depends?

Tobacco companies are unlikely to reduce their profit per pack of cigarettes to avoid an increase in the cost per pack to consumers in Coponia.

Previous increases in cigarette prices in Coponia have generally been due to increases in taxes on cigarettes.

Any decrease in per capita sales of cigarettes in Coponia will result mainly from an increase in the number of people who quit smoking entirely.

At present, the price of a pack of cigarettes in Coponia includes taxes that amount to less than ten percent of the total selling price.

The number of people in Coponia who smoke cigarettes has remained relatively constant for the past several years.

答案选a。不明白啊，谁能讲解一下呢？

graceliuwang

同问,题目不明白,谁能解释一下

得拉

过去经验表明，香烟价格每提高１０个百分点，就伴随人均烟消费量下降４个百分点。所以，如果税收提高１０个百分点，可以预见人均烟消费量也会下降。

隐含的假设就是，税收提高会导致烟的价格上升．

这是一个supporter的假设。把两个关系连接起来。税收提高　导致　烟的价格上升　导致　人均烟消费量也会下降

跟a刚好一致．因为香烟公司不想降利润，必然维持原价格，直接把税的那个百分点加上去．

hedge

the same trouble i encountered

Sacramento_CA

恍然大悟。谢谢3楼的解释

benja

1. 架桥
                   税↑== price↑，而只有price↑才能导致sales↓

dan2007

up

120823892

可是觉得B选项也很符合啊，哪位牛牛能解释下？！！！

niclively

120823892 发表于 2013-8-3 13:56
可是觉得B选项也很符合啊，哪位牛牛能解释下？！！！

同意。。我觉得B也是表达类似的意思。。就是都是由税收引起的加价。。排除他因，同时也说明因为税收，商家一定会加价。。。

但是，A中是很直接的说明了商家不会作出任何的价格调整，在数据上，增加10个点的税就一定导致4个点的销售量下降；所以推论里面说上涨9cent和原来的90cent刚好是10%的比例，所以下降的4个点限制了她一定只能选出A
这能说清楚么？