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.

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概率达人请入内观看小弟感激不尽supposetherearefourfamilieseachwithparentsandson.theyaretobeseatedinarowof12seatsfrom

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.
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!

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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.

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.