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标题: GWD 13的19和23 [打印本页]

作者: yuyanhan 时间: 2005-4-27 15:48 标题: GWD 13的19和23

请教以下两题， 23、Yesterday each of the 35 members of a certain task force spent some time working on project P. The graph shows the number of hours and the number of members who spent that number of hours working on project P yesterday. What was the median number of hours that the members of the task force spent working on project P yesterday?

A. 2

B. 3

C. 4

D. 5

E. 6

Answer: e为什么不是A项呢，我已经看了网上的解答，可还是不明白

Q23:

In the decimal十进制 representation of x, where 0 < x < 1, is the tenths digit if x nonzero?

(1) 16x is an integer.

(2) 8x is an integer.

Answer: b

作者: sammen 时间: 2005-4-27 21:40

23条件1）X可以为1/16那么十分位是0，2/16十分位非0所以不确定。条件2）x可以＝1/8等等，十分位都是非0的。

19我没看图，但是做这个题目的思路一定是先排序再数除中间的数，（个数为奇数时候是中间的那个，偶数时候是中间那2个平均）

作者: bfghdggf 时间: 2005-4-28 13:27

ding !!!

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