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

In how many ways can five people be divided into three groups? (b) In how many ways can five people be distributed in three different rooms if no room must be empty? In how many ways can five people be arranged in three different rooms if no room must be empty and each room has 5 seats in a single row.

The number of ways in which 12 people may be divided into three sets of equal size is

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

Number of ways in which 200 people can be divided in 100 couples is -

Number of ways in which 200 people can be divided in 100 couples is -

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