Question

A={4,6,9,15,20,21} and B={6,15,20,23}. [5]

Find A∪B and A∩B and verify that

n (A)+n(B)=n(A∪B)+n(A∩B)​

Answer 1

Step-by-step explanation:

A∪B = {4,6,9,15,20,21,23} n(A∪B)=7

A∩B = {6,15,20} n(A∩B)=3

n (A) = 6 n(B)=4

n (A)+n(B)=n(A∪B)+n(A∩B)

6 + 4 = 7 + 3

10 = 10