Question

Let U = {English, French, History, Math, Physics, Chemistry, Psychology, Drama},

A = {English, Chemistry, French, Psychology},



B = {Math, Physics, History, French, Psychology},

and

C = {Drama, Chemistry, History}.

Find the following.

n[(A ∪ B) ∪ C]

Answer 1

A U B={English, Chemistry, French, Psychology, Math, Physics, History}

(A U B) U C={English, Chemistry, French, Psychology, Math, Physics, History, Drama}

n[(A U B) U C]=8