Project ForgeGeneral Aptitude
Quantitative Aptitude
GATE 2010
Easy
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:
3
Explanation
By inclusion-exclusion, persons playing at least one sport = 15+17−10 = 22. Persons playing neither = 25−22 = 3.
Source: GATE CS 2010 (2010)
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