In how many ways can Rs. 16 be divided into 4 persons when none of them gets less than Rs. 3?

In how many ways 10 persons can be divided into 5 pairs?

In how many ways 10 persons can be divided into 5 pairs?

In how many ways 100 persons can be divided into 50 pairs ?

In how many ways can 12 things be equally divided among 4 persons ?

In how many ways can 12 things be equally divided among 4 persons ?

In how many ways can 10 marbles be divided between two boys so that one of them may get 2 and the other 8?

In how many ways 2 persons can be selected from 4 persons?

In how many ways 2 persons can be selected from 4 persons?