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  1. If U = {a, b, c, d, e, f}, A = {a, b, c}, find (U ∪ A)′.
    1. U
    2. A
    3. Φ
    4. None of these
Correct Option: C

U ∪ A = {a, b, c, d, e, f} ∪ {a, b, c} = {a, b, c, d, e, f} = U
(U ∪ A)′ = Φ.


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