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Which statement is TRUE for any non-empty sets P and Q?
AIf P × Q = Q × P then P = Q
Bn(P × Q) ≠ n(Q × P) generally
CP × Q is always equal to ∅
DP × Q = Q × P always
Answer & Solution
Correct answer: A. If P × Q = Q × P then P = Q
P × Q = Q × P forces P = Q (because the components are reversed). Equal sets always commute trivially. Cardinality is always pq either way.
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