求教 GWD13-30！！

玛德滞涨 · 发表于 2016-3-11 22:57:31

插一句：楼主做prep的逻辑正确率在70-80%左右 GWD一做就50-60% 正常吗。。。

好了贴题
The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county.However, the percentage of households with an annual income of $60,000 or more is highest in Sommer county.

If the statements above are true, which of the following can properly be concluded on the basis of them?

A.No household in Merton county has an annual income of $60,000 or more.
B.Some households in Merton county have an annual income between $40,000 and $60,000.
C.The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county.
D.Average annual household income is higher in Sommer than in Merton county.
E.The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton
county.

正确答案是B而我选了A
我是这么想的既然M没有超过60000的话说明M的年收入超过40000的比例最高是指年收入在40000-60000 那么就可以合理解释为什么S的年收入超过60000的比例饿最高啦
而B选项也能理解只是用的some比较迷惑万一some只是代表的很小一部分呢那还是不能解释吧。。

求NN指点下A错在哪里了

玛德滞涨 · 发表于 2016-3-11 23:22:02

玛德滞涨 · 发表于 2016-3-12 09:54:55

PHDream16 · 发表于 2016-3-16 04:09:27

B is apparently correct.
Some households in Merton county have an annual income between $40,000 and $60,000.
Suppose no households in Merton country have annual income between 40K and 60K. The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county. This means that Merton has the highest percentage of over 60K. This is not true since the percentage of households with an annual income of $60,000 or more is highest in Sommer county.

A is wrong.  No household in Merton county has an annual income of $60,000 or more.
Merton county can have some household over 60K but the percentage is lower than Sommer.
Consider the following scenario:

         Merton Sommer
0-40K    0%    25%
40-60K 60%    25%
60+    40%    50%

This is fully plausible.

求教 GWD13-30！！

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