document.write( "Question 47502: The probability that a trainee will retain with the company is 0.8. The probability that an employee earns more than Rs. 20,000 per year is 0.004. The probability that an employee who was a trainee and remained with company or who earns more than Rs. 20,000 per year is 0.9
\n" ); document.write( "What is the probability that an employee earns more than Rs. 20,000 per year, given that he is a trainee who stayed with the company?
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Algebra.Com's Answer #31403 by stanbon(75887) $\"\"$ $\"About$

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The probability that a trainee will retain with the company is 0.8. The probability that an employee earns more than Rs. 20,000 per year is 0.004. The probability that an employee who was a trainee and remained with company or who earns more than Rs. 20,000 per year is 0.9
\n" ); document.write( "Prob(r)=0.8
\n" ); document.write( "Prob(>20K)=0.004
\n" ); document.write( "Prob(r or >20K) = 0.9
\n" ); document.write( "This is contradictory because
\n" ); document.write( "Prob (r OR >20K)=prob(r)+prob(>20K)-P(r AND >20K)
\n" ); document.write( "Then 0.9 = 0.8+0.004-P(r and >20K)
\n" ); document.write( "And P(r and >20K)=-0.096
\n" ); document.write( "But no Probability can be negative.
\n" ); document.write( "Are you sure you posted the 0.004 correctly?
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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