The number of ways that a garland is made with 18 flowers such that the two specified flowers should be side by side in the garland is

The number of ways in which 10 books can be arranged in a row such that two specified books are side by side is

The number of ways in which 7 people can sit in a round table so that two specified people sit side by side is

In how many ways a garland can be made from exactly 10 flowers?

The number of ways that a garland can be made out of 6 red and 4 white roses of different sizes so that all the white roses come together is .........

Number of different garlands that can be made using 5 flowers of one kind,3 flowers of another kind is -

Fifteen persons sit around a table. Find the number of arrangments that have two specified persons not sitting side by side.