document.write( "Question 994434: A sample of 100 wood and 100 graphite tennis rackets are taken from the warehouse. If 9 wood
\n" ); document.write( "and 19 graphite are defective and one racket is randomly selected from the sample, find the probability that the racket is wood or defective.
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Algebra.Com's Answer #613519 by Boreal(15235)\"\" \"About 
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Or means either one.
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\n" ); document.write( " Wood ;;;;;;;;;;; Graphite ;;; Total
\n" ); document.write( "Defective;;;;;; 9 ;;;;;;;;;;; 19;;; ;;28\r
\n" ); document.write( "\n" ); document.write( "non-D;;;;;; 91 ;;;;;;;;;;;;;;; 81;;;;;;;172\r
\n" ); document.write( "\n" ); document.write( "Total---------100--------------100-------200\r
\n" ); document.write( "\n" ); document.write( "Probability Wood is (100/200)
\n" ); document.write( "Probability defective is (28/200)
\n" ); document.write( "Probability BOTH is (9/200)
\n" ); document.write( "The answer is the sum of the first two minus the third, since we have double counted.
\n" ); document.write( "It is (100+28-9)/200=(119/200). It is the everything but graphite and non-defective.
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