document.write( "Question 762233: how many two-letter permutations can be formed from the three letters below:\r
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Algebra.Com's Answer #463834 by Edwin McCravy(20056)\"\" \"About 
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document.write( "Answer: 6 because: \r\n" );
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document.write( "You can choose the first letter any of 3 ways.\r\n" );
document.write( "Then for each of those 3 ways you can choose the first\r\n" );
document.write( "letter, that leaves 2 ways you can pick the second letter,\r\n" );
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document.write( "So that answer is 3×2 or 6.  Here are all 6 two-letter\r\n" );
document.write( "permutations listed:\r\n" );
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document.write( "1. TA\r\n" );
document.write( "2. TX   <-- when T was chosen as the 1st, that left 2, A and X, for the 2nd\r\n" );
document.write( "3. AT\r\n" );
document.write( "4. AX   <-- when A was chosen as the 1st, that left 2, T and X, for the 2nd\r\n" );
document.write( "5. XA\r\n" );
document.write( "6. XT   <-- when X was chosen as the 1st, that left 2, A and T, for the 2nd\r\n" );
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document.write( "3 ways to choose the first letter TIMES 2 ways to choose the second letter,\r\n" );
document.write( "and 3×2 = 6.  So you don't have to list them to find out how many there are,\r\n" );
document.write( "you can just multiply 3 by 2.\r\n" );
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document.write( "Edwin
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