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If A = {1, 2} and B = {3, 4}, which pair is NOT in A × B?
A(1, 3)
B(2, 4)
C(3, 1)
D(1, 4)
Answer & Solution
Correct answer: C. (3, 1)
Pairs in A × B must have the first entry from A, but 3 is not in A.
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