Find the total number of ways in which 20 balls can be put into 5 boxes so that first box contains just one ball.

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

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

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 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.

5 balls of different colours are to be kept in 3 boxes of different sizes.Each box can hold all five balls.Number of ways in which the balls can be kept in the boxes so that no box remain empty is