The total number of ways in which 12 persons can be divided into three groups of 4 persons each, is

The total number of ways in which 2n persons can be divided into n couples is

The total number of ways in which 2n persons can be divided into n couples is

The number of ways in which 9 persons can be divided into three equal groups is

The number of ways in which 9 persons can be divided into three equal groups is

Total number of ways in which “2n' persons can be divided into ‘n’ couples is

The number of ways in which 12 students can be equally divided into three groups is

The number of ways in which 12 students can be equally divided into three groups is

The number of ways in which 12 different objects can be divided into three groups each containing 4 objects is (i) ((12!))/((4!)^(3)(!3)) (ii) ((12!))/((4!)^(3)) (iii) ((12!))/((4!)) (iv) none

The number of ways can five people be divided into three groups is