Question

2. In a class of 130 students, 70 students like tea, 40 students like coffee, 30 students don't like both. Find the number of students who like both and illustrate this information by the means of a Venn- diagram.

Answer 1

Step-by-step explanation:

Don't like both means n(A delta B)=30

• n(T)=70
• n(C)=40
• n(TnC)=?????

Universal set=130

What is value of n(A U B) ??¿¿

Proceed after this.... Coz I couldn't think anymore...