Question

2. Let U = {1, 2, 3, 4, 5, 6, 7} be the universal set, while P = {1, 2, 3, 4, 5, 6} and Q = {1, 3, 5, 7}. Find (P-Q)'.​

Answer 1

{1,3,5,7}

Explanation:

P-Q = cancel item's from P who are also in Q = P - (P ^ Q) = {2,4,6}

now (P-Q)' = U - (P-Q)

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