Problem C. 1316. (November 2015)
C. 1316. In a classroom there are 18 seats altogether, forming 3 columns and 6 rows. 10 girls and 7 boys sit down in the classroom. How many different seating arrangements are possible if no row or column may consist of all boys or all girls?
Deadline expired on December 10, 2015.
79 students sent a solution. 5 points: Dávid Levente, Fekete Balázs Attila, Szalay Gergő, Szécsi Adél Lilla, Szilágyi Éva. 4 points: Édes Lili, Mályusz Attila, Marozsák Tóbiás , Mikulás Zsófia, Németh Csilla Márta, Póta Balázs, Varga 157 Kristóf, Weisz Máté, Zsombó István. 3 points: 16 students. 2 points: 20 students. 1 point: 18 students. 0 point: 10 students. Unfair, not evaluated: 1 solution.