document.write( "Question 1130744: Shirt are being produced in a frim by three productions lines. Line A produced 50% shirts of which 4% are defective. Line B produced 30% of which 2% are defective. Line C produced 20% of which 1% are defective.
\n" ); document.write( "(A) what is the percentage of defective shirts produced by the frim?
\n" ); document.write( "(B) if a shirt is taken as a sample , and is found to be defective, what is the probability that it was produced by line B ?
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Algebra.Com's Answer #747361 by Boreal(15235)\"\" \"About 
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Use 1000 shirts A======B======C======total
\n" ); document.write( "non-def---------480----294---198----972
\n" ); document.write( "def--------------20------6----2------28
\n" ); document.write( "Total 500----300---200---1000\r
\n" ); document.write( "\n" ); document.write( "percentage defective is 2.8%, or 28/1000
\n" ); document.write( "Also 4%(.5)+2%(.3)+1%(.2)\r
\n" ); document.write( "\n" ); document.write( "if defective, from line would be 6/28 or 21.4%
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