Question 515090: 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 Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! 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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--> Wxxx and Kxxx
= 26*26*26 each side of the Mississippi
= 17576 each
= 35152
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There are exceptions too, eg, KDKA is in Pittsburgh, PA
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