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If A and B are two disjoint sets and n(A) = 15 and n(B) = 10. Find n(A ∪ B) and n(A ∩ B).

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If A and B are two disjoint sets and n(A) = 15 and n(B) = 10. Find n(A ∪ B) and n(A ∩ B).

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n(A ∩ B) = 0 

∵ A and B are disjoint net 

∴ n(A ∪ B) = n(A) + n(B) = 15 + 10 = 25.

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