In a class of 65 students, 20 students like only maths, 25 students like only English and 15 students like both English and maths. 8 students like computer and 3 students like all three subjects. No student likes computer together with just one of the other two subjects. How many students like only computer?
40% is the passing criteria in an examination. Out of 9 students who appeared, 4 failed and the remaining received 80%, 55%, 52%, 66% and 81% marks. The median of the percentage marks is equal to: