in a class of 60 students 30 like maths 25 like physics 30 like chemistry. if 10 like both physics and maths 5 like maths and chem and 5 like phy & chem and 3 like all the subjects. find student like none of subject if 100 students were surveyed

Answer 1

It is a common problem in set theory, however, it is not so common in a class of 60 students, 100 of them were surveyed.

Answer 2

41