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If A and B are two sets with A ∩ B = ϕ, then (A) n (A∪B) = n(A) + n(B) (B) n (A∩B) = n(A) + n(B)

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If A and B are two sets with A ∩ B = ϕ, then 

(A) n (A∪B) = n(A) + n(B)

(B) n (A∩B) = n(A) + n(B)

(C) n (A∪B) + n(A) = n(B)

(D) More than one of the above 

(E) None of the above

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1 Answer

+1 vote
by (47.4k points)

Correct option is (A) n (A∪B) = n(A) + n(B)  

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