Question

Let S = {Barnsley, Manchester United, Southend, Sheffield United, Liverpool, Maroka Swallows, Witbank Aces, Royal Tigers, Dundee United, Lyon} be a universal set, A = {Southend, Liverpool, Maroka Swallows, Royal Tigers}, and B = {Barnsley, Manchester United, Southend}. Find n((A ∩ B)').

Thanks..

Answer 1

$$(A\cap B)'=\{Barnsley, Manchester\ United,$$

$$Sheffield \ United, Liverpool,$$

$$Maroka\ Swallows, Witbank \ Aces, Royal \ Tigers,$$

$$Dundee \ United, Lyon\}$$

$$n(A\cap B)'=9$$