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标题: [讨论]GWD15-28 答案是不是错了? [打印本页]

作者: littlestoner 时间: 2007-8-15 19:22 标题: [讨论]GWD15-28 答案是不是错了?

GWD 15-28

A school administrator will assign each student in a group of n students tp one of m classrooms. If 3<m<13<n, is it possible to assign each of the n students to one of the m classrooms so that each classroom has the same number of students assigned to it?

(1) It is possible to assign each of 3n students to one of m classrooms so that each classroom has the samr number of students assigned to it.

(2) It is possible to assign each of 13n students to one of m classrooms so that each classroom has the samr number of students assigned to it.

为何答案是B?

第一条件也可成立啊? 假设n=14，m=7，3n就是42，42可以被7整除，不是吗?

请指点！

作者: aegeanyoung 时间: 2007-8-16 06:24

第一个条件不可以，如果有39个人，由9个班那么按条件1就可以平均分，但实际上分不了阿

作者: littlestoner 时间: 2007-8-16 13:51

got it, thanks !!!!!!!

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