If n(A B) = 50, n(A B) = 10, and n(B) = 20, find n(A).

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If n(A ∪ B) = 50, n(A ∩ B) = 10, and  n(B) = 20, find n(A).

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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