document.write( "Question 1194157: P(A) = 0.31
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Algebra.Com's Answer #826285 by ikleyn(52781)\"\" \"About 
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document.write( "You have  P(B given A) = 0.8.\r\n" );
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document.write( "By the definition of the conditional probability, it means that  P(A and B) / P(A) = 0.8,  or  \"P%28A_and_B%29%2FP%28A%29\" = 0.8,  or\r\n" );
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document.write( "    \"P%28A_and_B%29%2F0.31\" = 0.8.\r\n" );
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document.write( "It implies that\r\n" );
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document.write( "    P(A and B) = 0.8*0.31 = 0.248.    ANSWER\r\n" );
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