document.write( "Question 723663: If A and B are any two events with P(A) = .8 and P(B|A) = .4, then the joint probability of A and B is\r \n" );
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document.write( "A. 0.80 \r \n" );
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document.write( "B. 0.40 \r \n" );
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document.write( "C. 1.20 \r \n" );
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document.write( "D. 0.32 \n" );
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