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Question
Multiple Choice Question :
A = {a, b, p}, B = {2, 3}, C = {p, q, r, s} then n[(A ∪ C) × B] is _______
Options
8
20
12
16
Solution
12
Explanation;
A = {a, b, p}, B = {2, 3}, C = {p, q, r, s}
n(A ∪ C) × B
A ∪ C = {a, b, p, q, r, s}
(A ∪ C) × B = {(a, 2), (a, 3), (b, 2), (b, 3), (p, 2), (p, 3), (q, 2), (q, 3), (r, 2), (r, 3), (s, 2), (s, 3)}
n[(A ∪ C) × B] = 12
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