ChaseDream
搜索
返回列表 发新帖
查看: 1303|回复: 2
打印 上一主题 下一主题

有一道GWD的题不太懂,请教一下~

[复制链接]
跳转到指定楼层
楼主
发表于 2011-8-7 22:08:18 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Was the average (arithmetic mean) weight of the package mailed at a certain post office yesterday greater than 600 grams?
(1)    The total weight of the packages mailed at the post office yesterday was greater than 14,500 grams.
(2)      Fewer than 25 packages were mailed at the post office yesterday.
    
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.

答案是C,可我觉得是E......谁能帮我解答一下?谢谢!
收藏收藏 收藏收藏
沙发
发表于 2011-8-7 22:33:12 | 只看该作者
条件2说少于25包也就是小于等于24包。当为24时总数14500g平均数为6.04,已经大于600g了。所以C。注意fewer than的含义
板凳
 楼主| 发表于 2011-8-8 15:00:27 | 只看该作者
谢谢!恍然大悟~~
您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

手机版|ChaseDream|GMT+8, 2025-10-10 12:50
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2025 ChaseDream.com. All Rights Reserved.

返回顶部