If the universal set \mu = {x : 1 \le x \le 20} and
A = {y : multiple of 3}
B = |z : odd numbers}
Find A ∩ B
A
{1, 3, 6}
B
{3, 5, 9, 12}
C
{3, 9, 15}
D
{2, 3, 9}
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
\mu = {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}
Source: Myschool Past Questions Archive (Record #55386)