There are 60 pupil in a class.out of them 25 play football, 20 play hockey and30 cricket,12 play football and hockey 9 play hockey and cricket play cricket and football. 5 play all the games.Find how many of them play.

Question

1) none of the games
2)only cricket
3)only football

Answer 1

Use Venn diagram.

In the intersection of all 3 circles, place 5
You need 9 in the intersection of hockey and cricket, but you already counted 5 of those. So place 4 in the intersection of hockey and cricket which is NOT part of the central part.
continue in this fashion ....

Just realized that you appear to be missing information, namely how many play cricket and football

Answer 2

Need to study