The number of ways in which 9 things can be divided into twice groups containing `2, 3 and 4` things respectively is

The number of ways in which 9things can be divided into twice groups containing 2,3 and 4 things respectively is

The number of ways in which p+q things can be divided into two groups containing p and q things respectively is

The number of ways in which p+q things can be divided into two groups containing p and q things respectively is

The number of ways in which 11. different things can be divided into two groups containing 6 and 5 things respectively is

The number of ways in which 4n things can be divided into 4 equal parts 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

To find the number of ways in which m+n+p things can be divided into three groups containing m,n,p things severally.