document.write( "Question 367089: a company finds that 20% of thier employees resign within one year. \r
\n" ); document.write( "\n" ); document.write( "find the probability that among 30 employees, exactly 5 will resign \r
\n" ); document.write( "\n" ); document.write( "I got the answer of .421 but not sure, how to check it\r
\n" ); document.write( "\n" ); document.write( "thank you \n" ); document.write( "

Algebra.Com's Answer #261736 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively 
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document.write( "In this case p =.20 and q = .80
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document.write( "nCx = 
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document.write( "P(5 out of 30 will resign) = 30C5 *.2^5 * .8^25 = 142506 *.2^5 * .8^25 =.1723 \n" );
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