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每日一题--数学题目(1)

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楼主
发表于 2011-5-18 14:29:54 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Q4:
In a demographic study, the population and total income of a certain region were estimated from other data, and both estimates had lower and upper limits.  At the time of the estimates, was the per capita income for the region greater than $16,500?
    (1)    The lower limit for the estimate of the population was 330,000 people.
(2)     The lower limit for the estimate of the total income was $5,500,000,000.
    
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
                                                        Answer: E
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沙发
发表于 2011-5-20 08:23:18 | 只看该作者
会不会是条件说有lower和upper limit, 而1和2都只给了lower, 而没有提供uppper的情况, 所以条件不足呢?
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