document.write( "Question 921210: Can someone explain this to me, please?\r
\n" ); document.write( "\n" ); document.write( "If n(B) = 17, n(A ∪ B) = 25, and n(A ∩ B) = 6, find n(A)
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Algebra.Com's Answer #558853 by ewatrrr(24785)\"\" \"About 
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n(A or B) = n(A) + n(B) - n(A and B)
\n" ); document.write( " n(A) = n(A or B) - n(B) + n(A and B)
\n" ); document.write( "n(A) = 25 - 17 + 6 = 14
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