A school administrator will assign each student in a group of n students to 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 same 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 same number of students assigned to it.

为什么选B?谢谢解答！

貌似求n能否被m整除

（2）中

13n=mK， m<13所以，k应该能被13整除

n=mk/13 结果为整数

所以选B， 等待NN来confrimation?