Question

11) Maria, Daniel, Stephanie, Michael, Elena, Tyler, Sue, and Dimitri have reserved eight seats in a row at the theater, starting at an aisle seat. In how many ways can they arrange themselves if Maria and Daniel are to sit next to each other? A) 1440 B) 5040 C) 10,080 D) 11,520

Answer 1

as one person considering Maria and Daniel So now there will be total 7 persons they can sit in a row in 7 ways. L 11 Also Maria and Daniel can interchange their position in 21 ways .. Hence required number of wasts = 7! X2! = 10,080 option C) 10,000 is correct -