Question 14
Hana’s village schedules three green days per week for gardening. Each selected day needs at least four residents; every resident must attend at least one selected day; no one attends all three. The table marks each person’s available weekdays with O.
English translation, Monday=1 through Sunday=7: Ain 1,3,5,6; Boa 1,2,3; Chae 2,5; Doyun 3,4,6; Eun 1,4,7; Felix 2,4,6; Gaon 1,3,7; Hana 2,5,6. Which set of days works?
English translation, Monday=1 through Sunday=7: Ain 1,3,5,6; Boa 1,2,3; Chae 2,5; Doyun 3,4,6; Eun 1,4,7; Felix 2,4,6; Gaon 1,3,7; Hana 2,5,6. Which set of days works?