document.write( "Question 40310: Please help?
\n" ); document.write( "Two urns contain each contain white balls and black balls. Urn 1 contains four white balls and two black balls urn 2 contains six white balls and five black balls. A ball is drawn from each urn. What is the probability that both balls are black? \n" ); document.write( "
Algebra.Com's Answer #25720 by AnlytcPhil(1806)\"\" \"About 
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Two urns contain each contain white balls and black balls. Urn 1 contains four\r\n" );
document.write( "white balls and two black balls urn 2, contains six white balls and five black\r\n" );
document.write( "balls. A ball is drawn from each urn. What is the probability that both balls\r\n" );
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document.write( "Urn 1 contains 6 balls, 2 of which are black, so the probability of drawing\r\n" );
document.write( "a black ball from urn 1 is 2/6 or 1/3\r\n" );
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document.write( "Urn 2 contains 11 balls, 5 of which are black, so the probability of drawing\r\n" );
document.write( "a black ball from urn 2 is 5/11\r\n" );
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document.write( "P(getting black ball from urn 1 AND getting black ball from urn 2) \r\n" );
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document.write( "since these events are independent, we may multiply their probabilities\r\n" );
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document.write( "P(getting black ball from urn 1) × P(getting black ball from urn 2) =\r\n" );
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document.write( "1/3 × 5/11 = 5/33 \r\n" );
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document.write( "(or a little more than 15% of the time.)\r\n" );
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document.write( "Edwin\r\n" );
document.write( "AnlytcPhil@aol.com

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