Question: Use the union rule to answer the question. If n(B)=23, n(AB)=4 and n(AB)=51, what is n(A)? n(A)= (Simplify your answer.)

Use the union rule to answer the question.

If n(B)=23, n(AB)=4 and n(AB)=51,

what is n(A)?

n(A)=

(Simplify your answer.)

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