[PPSC Naib Tehsildar 2022]
Directions (Questions no. 31 to 34) : In a group of 200 people, 75 persons can play cricket or football but not hockey. 65 persons can play hockey or football but not cricket. 20 persons can play both football and hockey. 15 persons can play both cricket and football. 15 persons can play both hockey and cricket. 50 persons can play hockey and 5 persons can play all three games.
31. How many persons play exactly one game ?