Answer:
{aUb}' = {4, 12, 16}
Explanation:
GIven S= { 2,2,4,6,8,8,8,10,10,12,14,16,16,16,16,18,18,20}
a= { 2,6,8,8,10,18}
b = { 2,8,10,14,18,20}
Required
(aUb)'
aUb = {2, 6, 8, 10, 14, 18, 20}
{aUb}' are values of the set S that are not in aUb. The required values are;
{aUb}' = {4, 12, 16}