In a class of 60 students, 25 students play cricket, 20 students play tennis and 10 students play both games. Find the number of students who play neither.

In a class, 30% students fail in English, 20% students fail in Hindi and 10% students fail in both English and Hindi. A student is chosen at random, then what is the probability he fail in English, if he has failed in Hindi?

In a class of 25 students, 12 have taken Mathematics. 8 have taken Mathematics but not Biology. Find the number of students who have taken both Mathematics and Biology and the number of those who have taken Biology but not Mathematics. Each student has taken either Mathematics or Biology or both.

In a class of 35 students, 24 like to play cricket and 16 like to play football. Also, each student likes to play at least one of the two games. How many students like to play both cricket and football ?

Of the 125 students in an elementary school, 89 students play checkers and 45 students play checkers and chess. How many students in the school play chess?