DS:
Store S sold a total of 90 copies of a certain book during the seven days of last week,and it sold different numbers of copies on any two of the days,
If for the seven days Store S sold the greatest number of copies on Saturday and the second greatest number of copies on Friday,
did Store S sell more than 11 copies on Friday?
1) Last week Store S sold 8 copies of the book on Thursday.
2) Last week Store S sold 38 copies of the book on Saturday.
您需要 登录 才可以下载或查看,没有帐号?立即注册
举报
1)只要周五比周四多就行,周六卖多少没限制,周五可以大于11,也可以小于11
2)周六卖了38本,剩下5天共卖52本,就看周五取11本,其余4天均取最大可能行不行,11+10+9+8+7+6=51,正好差一本,所以周五一定卖了超过11本
B
发表回复
手机版|ChaseDream|GMT+8, 2025-7-28 01:19 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.