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If-n-A-B-32-n-B-12-and-n-A-B-5-then-n-A-




Question Number 7710 by abdel19599@yahoo.com last updated on 11/Sep/16
If n(A∪B)=32, n(B)=12 and n(A∩B)=5  then n(A)=?
Ifn(AB)=32,n(B)=12andn(AB)=5thenn(A)=?
Answered by Rasheed Soomro last updated on 11/Sep/16
 n(A∪B)=n(A)+n(B)−n(A∩B)  32=n(A)+12−5  n(A)=32−7=25
n(AB)=n(A)+n(B)n(AB)32=n(A)+125n(A)=327=25

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