If R = {2, 4, 6, 7} and S = {1, 2, 4, 8} then R ∪ S equals
A
{1, 2, 4, 6, 7, 8}
B
{1, 2, 4, 7, 8}
C
{1, 4, 7, 8}
D
{2, 6, 7}
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
R = {2, 4, 6, 7}, S = {1, 2, 4, 8}
R ∪ S ⇒ element in R and S together without replacement.
∴ R ∪ S = {1, 2, 4, 6, 7, 8}
Source: Myschool Past Questions Archive (Record #75804)