document.write( "Question 480801: if n(A U B)=60 ,n(A ∩ B)=40 ,and n(A)=n(B),find n(A) \n" ); document.write( "

Algebra.Com's Answer #329209 by Tatiana_Stebko(1539) $\"\"$ $\"About$

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n(A U B)=n(A)+n(B)-n(A ∩ B)
\n" ); document.write( "If n(A)=n(B), then n(A U B)=2n(A)-n(A ∩ B)
\n" ); document.write( "60=2n(A)-40
\n" ); document.write( "2n(A)=60+40
\n" ); document.write( "2n(A)=100
\n" ); document.write( "n(A)=50 \n" ); document.write( "

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