document.write( "Question 281468: How many different 4-letter radio station call codes are possible if each code must begin with K or W and no repetition of letters is permitted? \n" ); document.write( "
Algebra.Com's Answer #204478 by brucewill(101)\"\" \"About 
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The first letter must me K or W, 2 choices.
\n" ); document.write( "The second letter must not be the first letter, 25 choices.
\n" ); document.write( "The third letter must not be either of the first two letters, 24 choices.
\n" ); document.write( "The fourth letter must not be either of the first 3 letters, 23 choices.\r
\n" ); document.write( "\n" ); document.write( "\"2%2A25%2A24%2A23\"\r
\n" ); document.write( "\n" ); document.write( "27600 possible combination.
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