document.write( "Question 1191405: List all the permutations of the 4 objects a, b, c, and d, taken 2 at a time. \n" ); document.write( "
Algebra.Com's Answer #823240 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "I don't know what it is about this that you need help with....

\n" ); document.write( "The first letter can be any of the four given letters; for each first letter, the second letter can be any of the three remaining letters.

\n" ); document.write( "To make sure you get all the permutations, keep them in alphabetical order.
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document.write( "      b  -->  ab\r\n" );
document.write( "    /\r\n" );
document.write( "  a - c  -->  ac\r\n" );
document.write( "    \\r\n" );
document.write( "      d  -->  ad\r\n" );
document.write( "\r\n" );
document.write( "      a  -->  ba\r\n" );
document.write( "    /\r\n" );
document.write( "  b - c  -->  bc\r\n" );
document.write( "    \\r\n" );
document.write( "      d  -->  bd\r\n" );
document.write( "\r\n" );
document.write( "      a  -->  ca\r\n" );
document.write( "    /\r\n" );
document.write( "  c - b  -->  cb\r\n" );
document.write( "    \\r\n" );
document.write( "      d  -->  cd\r\n" );
document.write( "\r\n" );
document.write( "      a  -->  da\r\n" );
document.write( "    /\r\n" );
document.write( "  d - b  -->  db\r\n" );
document.write( "    \\r\n" );
document.write( "      c  -->  dc
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