document.write( "Question 1096149: Please help... I am confused.
\n" ); document.write( "A and B are trying to solve a problem. A has a chance of 65%, B has a chance of 75% solving the problem. What is the probability of A solves the problem given that someone solved the problem.
\n" ); document.write( "Thank you.
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Algebra.Com's Answer #710657 by greenestamps(13334)\"\" \"About 
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\n" ); document.write( "The probability that A solves the problem is 0.65, so the probability that A does NOT solve the problem is \"1-0.65+=+0.35\".

\n" ); document.write( "The probability that B solves the problem is 0.75, so the probability that B does NOT solve the problem is \"1-0.75+=+0.25\".

\n" ); document.write( "Then the probability that NEITHER A NOR B solves the problem is \"0.35%2A0.25+=+.0875\"

\n" ); document.write( "And so the probability that someone solves the problem is \"1-.0875+=+0.9125\".

\n" ); document.write( "And finally the probability that A solves the problem, GIVEN THAT someone solves the problem, is \"0.65%2F0.9125+=+0.71233\" (to 5 decimal places).

\n" ); document.write( "If you want an exact answer, use fractions instead of decimals:

\n" ); document.write( "The probability that A solves the problem is 13/20, so the probability that A does NOT solve the problem is \"1-13%2F20+=+7%2F20\".

\n" ); document.write( "The probability that B solves the problem is 3/4, so the probability that B does NOT solve the problem is \"1-3%2F4+=+1%2F4\".

\n" ); document.write( "Then the probability that NEITHER A NOR B solves the problem is \"%287%2F20%29%2A%281%2F4%29+=+7%2F80\"

\n" ); document.write( "And so the probability that someone solves the problem is \"1-7%2F80+=+73%2F80\".

\n" ); document.write( "And finally the probability that A solves the problem, GIVEN THAT someone solves the problem, is \"%2813%2F20%29%2F%2873%2F80%29+=+%2852%2F80%29%2F%2873%2F80%29+=+52%2F73\".
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