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标题: GWD 01-21 大家帮看看 [打印本页]

作者: caterpillarcn 时间: 2006-7-31 13:40
标题: GWD 01-21 大家帮看看

Q21:

The results of a certain experiment included 6 data values that were all multiples of the same number c, namely, c, 8c, 2c, 5c, 4c, and 4c. Was the average (arithmetic mean) of the 6 data values greater than 8?

(1) c < 4

(2) c > 2

答案是B。

怎么会呢？又没有说C是integer，上面6个数相加得23C，average是23C/6，所以 C<23/48 的话，B就不成立嘛。

作者: yaoyao99 时间: 2006-7-31 13:47

Please take a look at the existing discussions before you post your questions!

http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=176560&page=1

*GWD数学*讨论贴集锦！ by maki 点击此处查看

作者: caterpillarcn 时间: 2006-7-31 17:20

严重感谢！！

作者: caterpillarcn 时间: 2006-7-31 17:23

得，竟然这么简单的数学都算错了！

c, 8c, 2c, 5c, 4c, and 4c， average is 24c iso 23c. 相当的愤怒啊！

作者: yaoyao99 时间: 2006-7-31 23:34
Hee hee, that's how we learn our lessons and avoid doing that on the real exam! Jia you!!

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