Find the number of ways in which 4 distinct balls can be put into 3 distinct boxes so that no remains empty

The number of ways in which n distinct balls can be put into three boxes, is

The number of ways in which n distinct balls can be put into three boxes, is

The number of ways in which n distinct balls can be put into three boxes so that no two boxes remain empty is

Find the number of ways in which four distinct balls can be kept into two identical boxes so that no box remains empty.

Find the number of ways in which four distinct balls can be kept into two identical boxes so that no box remains empty.

The number of ways in which n distinct objects can be put into two identical boxes so that no box remains empty, is

Find the total number of ways in which n distinct objects can be put into two different boxes so that no box remains empty.

Find the total number of ways in which n distinct objects can be put into two different boxes so that no box remains empty.

Find the number of ways in which n distinct objects can be kept into two identical boxes o that n box remains empty.

Find the number of ways in which n distinct objects can be kept into two identical boxes so that no box remains empty is