Find the number of ways in which 9 objects can be divided into two groups of 6 and 3 respectively.

In how many ways can 15 things be divided into groups of 8, 4 and 3 respectively.

Number of ways in which 8 boys can sit in a circle

Number of ways in which 12 different things can be distributed in 3 groups, is

The number of ways in which n distinct objects can be put into two different boxes is:

Number of ways in which is 8 boys can sit in a circle?

In how many ways can 12 different balls be divided between 2 boys, one receiving 5 and the other 7 balls? Also, in how many ways can these 12 balls be divided into groups of 5,4 and 3 balls, respectively?

Find the number of ways in which 12 different beads can be arranged to form a necklace.

Find the number of ways in which n different beads can be arranged to form a necklace.

The total number of ways in which 2n persons can be divided into n couples is a. (2n !)/(n ! n !) b. (2n !)/((2!)^3) c. (2n !)/(n !(2!)^n) d. none of these

A bag contains 6 white marbles and 5 red marbles. Find the number of ways in which four marbles can be drawn form the bag if 2 must be white and 2 red.