In a class of 50 student, the number of students who offer Accounting is twice as the number who offer
Economics. 10 offer neither of the two subject.And 5 student offer both subject.
1:illustrate the information on the Venn diagram
2: how many students offer Accounting
3: how many students offer Economics.
4: how many students offer only one subject
oops. That's 50-10, not 60-10
A = 2E, so
2E + E - 5 = 60-10
Now draw your Venn diagram, and you can answer the questions.