Question

Given the following definitions:

U = {1, 2, 3, 4, 5, 6, 7}

A = {1, 2, 4, 5}

B = {1, 3, 5, 7}

How many elements are in (A' ∪ B)' ?

Answer 1

hi ! I think it’s : (A u B )= { 1, 5}