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标题: 请教OG的一道题 [打印本页]

作者: kittycd 时间: 2011-3-29 07:10 标题: 请教OG的一道题

我选D。可是答案选C。OG的解释好像也不是很对，想听听各位的想法。
24. 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 higher in Sommer County.

If the statements above are true, which of the following must also be true?

(A) The percentage of households with an annual income of $80,000 is higher in Sommer County than in Merton County.

(B) Merton County has the second highest percentage of households with an annual income of $60,000 or more.

(C) Some households in Merton County have an annual income between $40,000 and $60,000.

(D) The number of households with an annual income of more than $40,000 is greater in Merton County than in Sommer

County.

(E) Average annual household income is higher in Sommer County than in Merton County.

作者: dongstar 时间: 2011-3-29 19:45

Merton County赚40K以上的比例比较高，但是Sommer County 赚60K的比例却高，说明M郡赚40－60K之间的比例一定很高咯，所以选C

A根据目前条件无法预测的
B只在比M和S郡，不知道其他郡的情况，没法说是第二
C不完美，但是是最佳答案
D比率和数量完全是两码事。因为不知道住在M和S郡的人数，所以无法推测。比率高不一定人数就高，因为没有基数。
E无法得出此结论

作者: kittycd 时间: 2011-3-30 19:45

谢谢，我又想了一下。
我觉得即使根据条件也推不出 M郡赚40－60K之间的比例一定很高。
而且D选项和比率及数量也没有太大关系。因为从题干中无法推出S郡40K-60K之

间的人数。
C还靠点谱。
继续看OG！呵呵。

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