|
|
|
The Star newspapers are sold at Varsity Mall. The number of newspapers sold each day follows a normal probability distribution with a mean of 200 copies and a standard deviation of 17 copies. How many copies of The Star newspapers should Varsity Mall order, so that it only runs out of newspaper on 20% of the days? |
|
发表于 25-6-2013 11:42 AM
变色卡
千斤顶
本周最热论坛帖子
1186 
40
