Question

In A Class Of 60 Students, 30 Offer Physcis And 40 Offer Chemistry, (a)Use Venn Diagram To Represent This Information (b) How Many Students Offer Both Subject. find the number of those that offered history only, the number that offered economics only, the number of student that offered literature only

Answer 1

so, did you make the diagram?
If x take both, then 30+40-x = 60
assuming everyone took something.