2002 Math OSP, Number 17
Discrete Mathematics
Level
3
4 pairs of husbands and wifes buy tickets for 8 seats in the same row in a show. 2 people will sit next to each other only if the two are pairs of husband and wife or have the same gender. How many ways are there to put these 4 pairs of husbands and wifes onto those 8 seats?
by
Abyoso Hapsoro