概率达人请入内观看小弟感激不尽

分类: 作业答案 • 2022-03-29 22:45:08

问题描述：

概率达人请入内观看小弟感激不尽
suppose there are four families each with parents and son.they are to be seated in a row of 12 seats from left to right.how many different ways can they be seated,if each family is to be seated together.
就是说 4个家庭每个家庭是3个人父母和儿子.现在有12个座位从左到右排列如果他们全部是一家人一起有多少个坐法!