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प्रश्न
If the set A has p elements, B has q elements, then the number of elements in A × B is
पर्याय
(a) p + q
(b) p + q + 1
(c) pq
(d) p2
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उत्तर
(c) pq
n(A × B) = n(A) × n(B)
= p × q = pq
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