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标题: 一道GWD简单题，想不明白 [打印本页]

作者: wydning 时间: 2009-10-12 14:07
标题: 一道GWD简单题，想不明白

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.

我觉得选B吧，答案是E，请大家帮忙解释一下~~

作者: esea 时间: 2009-10-12 14:56

相当于是一道收入密度分布的数学题,M的超过40000的百分率是所有county最高(higher than any other),而S的超过60000的百分率是最高.

可以推出M大部分家庭的收入在40000和60000间,超过60000的较少.所以E对.

如果B中的SOME改为MOST就对了.

作者: wydning 时间: 2009-10-12 15:14
十分感谢指教，可是大于80000原文没有提到啊，能conclude出来么。。。收入密度这类题什么意思呢

作者: sunjin1988 时间: 2009-10-12 16:19
这题答案是B 吧我前几天刚做的！

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