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For P = {a, b, c} and Q = {r}, how do P × Q and Q × P compare?
AThey are exactly the same set
BDifferent sets with equal sizes
CDifferent sets with unequal sizes
DSame set only when r is in P
Answer & Solution
Correct answer: B. Different sets with equal sizes
The pair (a, r) differs from (r, a), so the sets are unequal, though each has three pairs.
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