document.write( "Question 266112: The call letters of a radio station must have 4 letters. The first letter must be a K or a W. How many different station call letters can be made if repetitions are not allowed? If repetitions are allowed?
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Algebra.Com's Answer #195539 by Alan3354(69443) $\"\"$ $\"About$

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The call letters of a radio station must have 4 letters. The first letter must be a K or a W. How many different station call letters can be made if repetitions are not allowed?
\n" ); document.write( "1st letter is K or W
\n" ); document.write( "2nd letter is one of 25
\n" ); document.write( "3rd is one of 24
\n" ); document.write( "4th is one of 23
\n" ); document.write( "--> 25*24*23 = 13,800
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\n" ); document.write( " If repetitions are allowed?
\n" ); document.write( "Each is 1 of 26
\n" ); document.write( "--> 26^3 = 17,576
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\n" ); document.write( "With a few exceptions, the 1st letter K is west of the Mississippi, and the W is east of it.
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\n" ); document.write( "A few stations have only 3 letters, too. WBZ WWL WGN KGO KFI and some others.
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\n" ); document.write( "Each country has its 1st letter(s) assigned. C is Canada, G is England. \n" ); document.write( "

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