25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both…
By inclusion-exclusion, at least 15+17-10=22 of the 25 persons play hockey or football, so 25-22=3 play neither game.
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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
Answer and explanation
Correct answer D
By inclusion-exclusion, at least 15+17-10=22 of the 25 persons play hockey or football, so 25-22=3 play neither game.