GATE | GATE CS 2010 | Question 59

25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is:
(A) 2
(B) 17
(C) 13
(D) 3

Answer: (D)

Explanation: 25 – (15+ 17-10)

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