help me with this math please
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The relation between n (A), n (B), n (A ∩ B) and n (A U B) can be given as follows : n (A U B) = n (A) + n (B) - n (A ∩ B) - Here, the union of A & B is equal to the sum of elements of A and elements of B and then subtracting the intersection of A & B from it
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