Question

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 1

17 of them doesn't play anything

Answer 2

Answer:

3

Explanation:

only play hockey = 15-10=5

only play football=17-10=7

5+7+10=22

25-22=3