Question

Let A = {1, 3, 7, 8} and B = [2, 4, 7, 9}. 

Find A ∩ B. 

Answer 1

Given sets A = (1, 3, 7, 8} and B = {2,4, 7,9} 

A ∩ B = {1, 3, 7, 8} ∩ (2, 4, 7, 9} = {7}