document.write( "Question 978547: A box of 20 pens has 6 that have dried out. A teacher selects 5 pens and puts then in her purse.
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document.write( "How many ways can she select 4 good pens and 1 bad pen. \r
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document.write( "- I started with 14 C 4 (this represents the good pens) * 6 C 1 (rep. bad pens) = 6006
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document.write( "Using combinations (nCr) because order doesn't matter.
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document.write( "I'm not sure if that is my final answer or if I have to divide by something else.
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document.write( "Please provide steps with brief reasoning so I can understand. \n" );
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Algebra.Com's Answer #599907 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! A box of 20 pens has 6 that have dried out. A teacher selects 5 pens and puts then in her purse. \n" ); document.write( "How many ways can she select 4 good pens and 1 bad pen. \n" ); document.write( "- I started with 14 C 4 (this represents the good pens) * 6 C 1 (rep. bad pens) = 6006 \n" ); document.write( "Using combinations (nCr) because order doesn't matter. \n" ); document.write( "I'm not sure if that is my final answer or if I have to divide by something else. \n" ); document.write( "------- \n" ); document.write( "Your procedure and answer look good. \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "----------- \n" ); document.write( " |