(Q11).Let A = {1, 3, 7, 8} and B = {2, 4, 7, 9}. Find A ∩ B.

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

A ∩ B = {1, 3, 7, 8} ∩ {2, 4, 7, 9}

= {}