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

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 10 different diamonds can be arranged to make a necklace.

The number of ways in which a 7 people can sit around a round table 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.

The number of ways in which 21 objects can be grouped into three groups 8, 7 and 6 object is

Find the number of ways in which the number 300300 can be split into two factors which are relatively prime.

Find the number of ways in which n different prizes can be distributed among m(< n) persons if each is entitled to receive at most n-1 prizes.

There are six periods in each working day of a school. Find the number of ways in which 5 subjects can be arranged if each subject is allowed at least one period and no period remains vacant.

Find the number of ways in which two small squares can be selected on the normal chessboard if they are not in same row or same column.

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