document.write( "Question 857413: There are 8 black balls and 5 red balls in an urn. If 5 balls are drawn without replacement, what is the probability that exactly 1 black ball is drawn? \n" ); document.write( "

Algebra.Com's Answer #517312 by Edwin McCravy(20055) $\"\"$ $\"About$

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document.write( "To get the numerator of the probability:\r\n" );
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document.write( "Choose the 1 black ball any of C(8,1) ways.\r\n" );
document.write( "Choose the other four red balls C(5,4) ways\r\n" );
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document.write( "That's C(8,1)×C(5,4) = 8×5 = 40 ways.\r\n" );
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document.write( "To get the denominator:\r\n" );
document.write( "Choose any 5 balls from the 13 in C(13,5) = 1287 ways.\r\n" );
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document.write( "Probability that exactly 1 black ball is drawn = ,\r\n" );
document.write( "approximately 3.1% of the time.\r\n" );
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document.write( "Edwin

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