十月寂静的问题
6、DS:求the gross profit in producing and selling
(1) the total revenue in producing and selling 19600
(2)the total revenue 是the cost in producing的6/5
E
没告诉销售成本,数学就错这里了,我选b 中文不难理解,英文会是个陷阱,大家小心
【讨论】
那也应该选C啊,因为PROFIT是绝对值,所以知道6/5是不够的 , 对吗???
9、 45% the apartments with <=3 people living in each one. What’s the median?
(1)80% of the apartments have <=5
(2)35% of the apartments have >=5
###(C) Note: Median is 4
啊??/在31道难题里答案不是B吗?我也认为B够了。
1. DS: 两班学生考试, A and B, the scores show that means of A and B are 84 and 78, respectively, Media of A and B are 75 and 82, respectively. Does the mean of A+B greater than the media of A+B?
A) I forgot… B) the number of students in A and B is 43 and 37.
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E
条件B):平均值=81。A、B两班和起来,共80人,中数为40+41的和。(??/什么意思??)
根据题目,A班中有22人多于75分,B班有19人多于82分。即41人多于75分,但不能确定是否多于80分。
什么意思??我最怕这种把两组MEAN/MEDIAN混起来的题目了,请指明方法!!!
谢谢了作者: twinhead 时间: 2002-10-9 08:11