BPSC 66th Prelims Prelims 27 Dec 2020 Solved Paper

In a group of athletic teams in a school, 21 are in the basketball team, 26 in the hockey team and 29 in the football team. If 14 play hockey and basketball, 12 play football and basketball, 15 play hockey and football, 8 play all the three games, on how many play football only?