Given that A = {1, 5, 7}
B = {3, 9, 12, 15}
C = {2, 4, 6, 8}
Find (A ∪ B) ∪ C
-
{1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15}
- {1, 2, 3, 5, 6, 8, 12, 15}
- {2, 4, 5, 9, 12, 15}
- {1, 5, 6, 7, 8, 9, 12, 15}
The correct answer is: A
Explanation
{A ∪ B ∪ C}{A ∪ B} = {1, 3, 5, 7, 9, 12, 15}
∪ C={2,4,6,8}
{A ∪ B} ∪ C = {1, 3, 5, 7, 9, 12, 15} ∪ {2, 4, 6, 8}
= {1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15}
{A ∪ B} ∪ C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15}
There is an explanation video available .