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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 households in Merton county has an annul 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.
答案是B 我想问A哪里有问题啊？题目说在M城市里每人年收入超过40000的百分比比其他城市高，而在S城市收入超过60000的百分比是最高的。A选项说因为在M城市没有收入超过60000的，这不正好conclude the basis了么？
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发表于 2010-7-19 20:46:13
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