document.write( "Question 963372: how many ways can you arrange nine pairs of shoes if they are not separated
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Algebra.Com's Answer #588529 by Edwin McCravy(20054)\"\" \"About 
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document.write( "Choose the pair to go 1st in 9 ways.\r\n" );
document.write( "Choose the pair to go 2nd in 8 ways.\r\n" );
document.write( "Choose the pair to go 3rd in 7 ways.\r\n" );
document.write( "Choose the pair to go 4th in 6 ways.\r\n" );
document.write( "Choose the pair to go 5th in 5 ways.\r\n" );
document.write( "Choose the pair to go 6th in 4 ways.\r\n" );
document.write( "Choose the pair to go 7th in 3 ways.\r\n" );
document.write( "Choose the pair to go 8th in 2 ways.\r\n" );
document.write( "Choose the pair to go 9th in 1 way.\r\n" );
document.write( "Choose the shoe order for the 1st pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 2nd pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 3rd pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 4th pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 5th pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 6th pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 7th pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 8th pair 2 ways (left,right) or (right,left).\r\n" );
document.write( "Choose the shoe order for the 9th pair 2 ways (left,right) or (right,left).\r\n" );
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document.write( "Answer: 9*8*7*6*5*4*3*2*1*2*2*2*2*2*2*2*2*2 = 9!*29 = 185794560.\r\n" );
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document.write( "Edwin
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