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Question
If n (A ∩ B) = 3 and n(A ∪ B) = 10, then find n(P(A ∆ B))
Solution
n(A ∪ B) = 10; n(A ∩ B) = 3
n(A ∆ B) = 10 – 3 = 7
and n(P(A ∆ B)) = 27 = 128
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