麻烦各位求解一道题！GWD14--30题

mimioy · 发表于 2010-7-31 00:06:14

30. GWD17-Q30:

In a study conducted in Pennsylvania, servers in various restaurants wrote “Thank you” on randomly selected bills before presenting the bills to their customers.Tips on these bills were an average of three percentage points higher than tips on bills without the message.Therefore, if servers in Pennsylvania regularly wrote “Thank you” on restaurant bills, their average income from tips would be significantly higher than it otherwise would have been.

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

A.The “Thank you” messages would have the same impact on regular patrons of a restaurant as they would on occasional patrons of the same restaurant.

B.Regularly seeing “Thank you” written on their bills would not lead restaurant patrons to revert to their earlier tipping habits.

C.The written “Thank you” reminds restaurant patrons that tips constitute a significant part of the income of many food servers.

D.The rate at which people tip food servers in Pennsylvania does not vary with how expensive a restaurant is.

E.Virtually all patrons of the Pennsylvania restaurants in the study who were given a bill with “Thank you” written on it left a larger tip than they otherwise would have.

答案选B 但是如果patron不因为thank you 而改变tip, 那么写不写thank you 就和tip higher 没有关系了，怎么做前提呢？
请教各位！

mimioy · 发表于 2010-7-31 00:13:05

哪位高人可以指点迷津？小妹感激不尽。。。

mimioy · 发表于 2010-7-31 00:21:21

有谁可以解答吗？confusing。。。顶~

sugaryun · 发表于 2010-7-31 00:26:46

你的思路有问题。假设题的解题方法是要找有差异的概念。即原文的事实与结论之间存在一个缺陷（GAP）。这个gap就是偶尔写谢谢和经常写谢谢对顾客给小费的习惯有没有影响。只有顾客不受影响，才能推出小费高的结论。
选项B就是这个意思。其他选项可用无关词排除法排除。

lydia1219 · 发表于 2010-12-13 03:52:56

那E 呢？谁来解释下E选项。不太理解E的意思

sdcar2010 · 发表于 2010-12-13 13:01:06

E is not required for the argument to hold. The qualifier "Virtually all" is too strong.

麻烦各位求解一道题！GWD14--30题

所属分类: GMAT考试

正在浏览此版块的会员 ()