document.write( "Question 939609: A certain manufactured part can be defective because it has one or more out of the three possible defects: insufficient tensile strength, a burr, or a diameter outside of tolerance limit. In a lot of 500 pieces: 19 have a tensile strength defects, 17 have a burr, 11 have an unacceptable diameter, 12 have tensile strength and burr defects, 7 have tensile strength and diameter defects, 5 have burr and diameter defects and 2 have all three defects. Determine: \n" );
document.write( "How many of the pieces have no defects? \n" );
document.write( "How many pieces have only burr defects? \n" );
document.write( "How many pieces have exactly 2 defects? \n" );
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