If n(A) = 5, n(B) = 10 and n(C) = 20 for three disjoint sets... — Mathematics | Mockzy

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If n(A) = 5, n(B) = 10 and n(C) = 20 for three disjoint sets A, B and C, then what is the value of n(A∪B∪C)?

None of these

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