In a class of 100 students, 60 offer physics, 50 offer chemistry, 40 offer biology, 25 offer physics and chemistry, 20 offer physics and biology, 15 offer chemistry and biology, and 10 offer all three subjects
A) Draw a three-set Venn diagram
B) Find the number of students who offer
1. Physics only
2. Chemistry only
3. Biology only
4. Exactly two subjects
5. None of the subjects
