Find the number of ways in which a lady can invite 6 guests selected from 10 friends so that two of the friends will not attend the party together?

A lady gives a dinner party for six guest. The number of wages in which they may be selected from among 10 friends, if two of the friends will not attend the party together is

The number of ways in which we can post 5 letters in 10 letter boxes is

Find the number of ways in which we can choose a committee from 4 men and 6 women, so that the committee includes two men exactly twice as many women as men

Find the number of ways in which 5 red and 4 white balls can be drawn from a bag containing 10 red and 8 white balls.

The number of ways in which 6 different books can be distributed among 5 students is

The number of ways in which n books can be arranged on a shelf so that two particular books are not together is

The nember of ways in which 5 male and 2 female members of a committee can be seated around a round table so that the two females are not seated together is ....... .

The number of ways, in which a student can choose 5 courses out of 8 courses, when two courses are compulsory, is

Find the number of ways in which 12 different flowers can be arranged in a garland so that 4 particular flowers are always together?