document.write( "Question 188433: If P(A)=0.5 and P(B)=0.25 and P(A intersection sign B)= 0.07\r
\n" ); document.write( "\n" ); document.write( "Find P(B/A')
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Algebra.Com's Answer #141262 by stanbon(75887)\"\" \"About 
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If P(A)=0.5 and P(B)=0.25 and P(A intersection sign B)= 0.07
\n" ); document.write( "Find P(B/A')
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\n" ); document.write( " P(B|A') = P(B and A')/P(A')
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\n" ); document.write( "One way to do this:
\n" ); document.write( "1st: draw a venn diagram with two intersecting circles, A and B.
\n" ); document.write( "Label A with 50 and B with 25 and (A intersection B) with 7
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\n" ); document.write( "Then there are 50+25-7 = 68 is the number in AUB.
\n" ); document.write( "Then 32 is the number in (AUB)'.
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\n" ); document.write( "So, P(B and A') = 18/100 and P(A') 50/100
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\n" ); document.write( "Ans: P(B|A') = 18/50 = 9/25
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \r
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