A tea party is arranged for 2m people along two sides of a long table with m chairs on each side, r men wish to sit on one particular side and s on the other. IN how many ways can they be seates ? `[r,s,lem]`

A tea party is arranged for 16 persons along two sides of a long table with 8 chairs on each side.Four persons wish to sit on one particular and two on the other side.In how many ways can they be seated?

A number of 18 guests have to be seated,half on each side of a long table.Four particular guests desire to sit on one particular side and three others on the other side.Determine the number of ways in which the sitting arrangements can be made.