document.write( "Question 436495: If nPr= 55400 and nCr=462, determine r. \n" ); document.write( "
Algebra.Com's Answer #301989 by richard1234(7193)\"\" \"About 
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I think you may have typoed and put 55400 instead of 55440 (simply because 55400/462 is not an integer, as you will see).\r
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\n" ); document.write( "\n" ); document.write( "For this problem, we can note that . Since r! = 120, r = 5.
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