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[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!

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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

TOP

got it, thanks !!!!!!!

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