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GWD数学求解,请大牛帮忙

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楼主
发表于 2009-10-15 22:23:00 | 只看该作者

GWD数学求解,请大牛帮忙

GWD12

4,In a demographic study, 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 $16500?

(1). The lower limit for the estimate of the population was 330000 people

(2)The lower limit for the estimate of the total income was $5500000000.

答案是选择E,可是我认为C,因为5500000000/330000=16666.666>16500

33.150,200,250,n

Which of the following could be the median of the 4 integers listed above?

1, 175

2, 215

3. 235

A 1 only

B 2 only

C 1 and 2 only

D 2 and 3 only

E 1,2 and 3

答案是选择C,可我认为选择A最合理,请帮忙求解

沙发
 楼主| 发表于 2009-10-16 22:17:00 | 只看该作者
天啊,请问没人能够解题吗?
板凳
发表于 2009-10-16 23:44:00 | 只看该作者

1,不知道两数的最大值,如果人口数无穷大,则<16500了,选E

2,150<n<200时,中数有可能是215,选C

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