求助GMAT 数学

Igor1129

OG13中DS的135题：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.


答案是B.


我想问一下：题干问的是possible，我理解possible为只要有满足的情况就算possible。那么条件1有的情况满足，有的情况不满足，所以1也算possible--有可能啊。为什么答案说not sufficient啊？求高手指点！！！