If the universal set μ = {x : 1 ≤ x ≤ 20} and
A = {y : multiple of 3}
B = |z : odd numbers}
Find A ∩ B
- {1, 3, 6}
- {3, 5, 9, 12}
-
{3, 9, 15}
- {2, 3, 9}
The correct answer is: C
Explanation
μ = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
A = {3, 6, 9, 12, 15, 18}
B = {1, 3, 5, 7, 9, 11, 13, 15, 17, 19}
A ∩ B = {3, 9, 15}
There is an explanation video available .