document.write( "Question 1181038: Find the missing probability.\r
\n" ); document.write( "\n" ); document.write( "P(A∩B)=3/100,P(B|A)=3/20,P(A)=? \n" ); document.write( "
Algebra.Com's Answer #810848 by Edwin McCravy(20054)\"\" \"About 
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document.write( "P(A∩B)=3/100 = 0.03 = P(B∩A),\r\n" );
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document.write( "P(B|A)=3/20 = 0.15 = P(B∩A)/P(A) = 0.03/P(A)\r\n" );
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document.write( "0.15 = 0.03/P(A)\r\n" );
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document.write( "0.15P(A) = 0.03\r\n" );
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document.write( "P(A) =0.03/0.15 = 0.2 = 2/10 = 1/5\r\n" );
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document.write( "Edwin
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