UPSC CAPF AC 2020 Paper

Total children = 100
Number of children playing cricket = 64
Number of children who like to play football = 53
Number of children who like to play both cricket and football = 20
∴ Number of children who do not like to play cricket or football
= 100 - (64 + 53 - 20)
= 100 - 64 - 53 + 20
= 120 - 117 = 3