SOLUTION: Commercial radio station call letters are composed of four letters* of the English alphabet (such as WABC). Stations located east of the Mississippi must start with W. How many dif

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Question 516752: Commercial radio station call letters are composed of four letters* of the English alphabet (such as WABC). Stations located east of the Mississippi must start with W. How many different 4-letter radio station call letters are possible? Repetition is permitted. *in early radio, only three were necessary such as WOR.
Answer by stanbon(75887) About Me  (Show Source):
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Commercial radio station call letters are composed of four letters* of the English alphabet (such as WABC). Stations located east of the Mississippi must start with W. How many different 4-letter radio station call letters are possible? Repetition is permitted.
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1st letter: 1 way
2nd letter: 26 ways
3rd letter: 26 ways
4th letter: 26 ways
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Total # of call letters: 1*26^3 = 17576
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Cheers,
Stan H.