In a class 18 students took physics, 23 took chemistry, 24 took maths, out of them 13 took chemistry and mathematics, 12 took physics and chemistry, 11 took physics and mathmetics. if 6 were offered all the three subjects find :
1. Total number of students in class
2. How many took maths but not chemistrty
3. How many took exactly one of the three subjects
Hi!
Let P, C and M denote the set of student who had taken Physics, Chemistry and Mathematics respectively.
Cheers!