SOLUTION: How many seven-letter code words can be formed using a standard 26 alphabet if repetition is allowed? And if repetition is not allowed?

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Question 1135577: How many seven-letter code words can be formed using a standard 26 alphabet if repetition is allowed? And if repetition is not allowed?
Answer by ikleyn(52806)   (Show Source): You can put this solution on YOUR website!
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There are 26 independent opportunities for each of the 7 positions,


so the total number of 7-letter codes is   = 8031810176.   ANSWER

Solved.


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