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2. There are 2 students A&B in a group of N students.Find the number of ways of assigning the N students to a line of n single rooms such that A&B are in adjacent rooms.

Answer» 2. There are 2 students A&B in a group of N students.Find the number of ways of assigning the N students to a line of n single rooms such that A&B are in adjacent rooms.


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