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标题: gwd-3-33 [打印本页]

作者: lingdang1988 时间: 2005-9-12 13:03 标题: gwd-3-33

Q33:

150, 200, 250, n

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

I. 175

II. 215

III. 235

A. I only

B. II only

C. I and II only

D. II and III only

E. I, II, and III

I chosed E but it's the wrong answer...who can help? Thanks a lot!

作者: lolo5595 时间: 2005-9-12 14:30

Try the option one by one. Taking the option 3 (235) to N, the order will be 150,200,235,250. Therefore the median will be half of sum (200+235), which is not equal to 235. Then option 3 is not right.

作者: equilibrium 时间: 2005-9-13 06:04

这题我也选错D了，我是应为把median 当成mean,所以错了，不知妹妹是不是也是因为粗心？

235 在200和250之间，则N应该在200与250之间，N与200的平均数为235，这样N为270，超出250 ，矛盾，所以C

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