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If the universal set x 1 x 20 and A y multiple ... - JAMB Mathematics 2019 Question

If the universal set μ = {x : 1 ≤ x ≤ 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}
correct option: c

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}

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