A round table conference is to be held between delegates of 20 cuntries. In how many ways can they can they be seated if two particular delegates may wish to sit together?

A round table conference is to be held between 20 delegates and 20 countries. In how many ways can they be seated if two particular delegates are always to sit together?

A round table conference is to be held between 20 delegates of 20 countries. In how many ways can they be seated if two particular delegates are always together.

A round table conference is to be held between delegates of 20 countries. In how many ways can they be seated if two particular delegates are never together?

A round table conference is to be held between 20 delegates of 20 countries . The number of ways that they can be seated if two particular delogates are always to sit together is

A round table conference is to be held among 20 delegates of 20 countries. The number of ways they can seated, if two particular delegates are never sit together is

A round-table conference is to be held among 20 delegates belonging from 20 different countries. In how many ways can they be seated if two particular delegates are (i) always to sit together, (ii) never to sit together .

A round-table conference is to be held among 20 delegates belonging from 20 different countries. In how many ways can they be seated if two particular delegates are (i) always to sit together, (ii) never to sit together .

A round-table conference is to be held among 20 delegates belonging from 20 different countries. In how many ways can they be seated if two particular delegates are (i) always to sit together, (ii) never to sit together .

A round-table conference is to be held among 20 delegates belonging from 20 different countries. In how many ways can they be seated if two particular delegates are (i) always to sit together, (ii) never to sit together .

A round-table conference is to be held among 20 delegates belonging from 20 different countries.In how many ways can they be seated if two particular delegates are (i) always to sit together,(ii) never to sit together