- UID
- 472491
- 在线时间
- 小时
- 注册时间
- 2009-9-9
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
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
答案C。
但是总重大于14500，包数小于25，只能说明平均大于580呀？能保证大于600吗我选了E
请大家帮我看看这题。
(2)Fewer than 25 packages were mailed at the post office yesterday
答案C。
但是总重大于14500，包数小于25，只能说明平均大于580呀？能保证大于600吗我选了E
请大家帮我看看这题。 |
|
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2010-5-19 11:00:07
收藏
收藏
楼主