Find the number of ways in which 7 persons can be arranged at a round table, if two particular persons may not sit together.

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

In how many ways can 7 people be arranged at round table, so that two particular persons be together?

In how many ways can 8 persons be seated at a round table so that 2 particular persons sit together?

Find the number of ways in which 12 different flowers can be arranged in a garland so that 4 particular flowers are never seperate.

There are 10 persons among whom two are brothers. The total number of ways in which these persons can be seated around a round table so that exactly one person sits between the btothers, is equal to:

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

In a party 23 persons take their seats at a round table. The odds against two particular persons sitting together are :

12 persons are to be arranged along a round table. If two particular persons among them are not to sit side by side, the total number of arrangements is