![Rank: 6](images/default/star_level3.gif) ![Rank: 6](images/default/star_level2.gif)
- 精华
- 1
- 积分
- 2038
- 经验
- 2038 点
- 威望
- 203 点
- 金钱
- 203 ¥
- 魅力
- 203
|
prep求解。。。。
what is the average height of the people in a certain group?
(1)the average height of the 3/n tallest people in the group is 6 feet 2.5 inches, and the average height of the rest of the people in the group is 5feet 10 inches.
(2)the sum of the heights of the n people is 178feet 9 inches.
答案选A 我觉得选D。。。。求真相。。。。 |
|