Find the number of ways in which 16 constables can be assigned to patrol  villages, 2 for each.

Find the number of ways in which 5 different books can be arranged on a shelf.

Find the number of ways in which four persons can sit on six chairs.

The number of ways in which 10 people can be assigned to two triple and two double rooms is

Find the number of ways in which 13 identical apples can be distributed among 3 persons so that no two persons receive equal number of apples and each can receive any number of apples.

Find the number of ways in which 13 identical apples can be distributed among 3 persons so that no two persons receive equal number of apples and each can receive any number of apples.

Find the number of ways in which 13 identical apples can be distributed among 3 persons so that no two persons receive equal number of apples and each can receive any number of apples.

Find the number of ways in which n different prizes can be distributed among m(