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Combinations or something

by rnaah » Wed Oct 05, 2011 12:44 am
Each item in a supermarket is coded with either a 5-letter code or a 4-letter code from the 26 alphabets. What is the maximum number of items in the supermarket that can be coded with these numbers?
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by sl750 » Wed Oct 05, 2011 12:55 am
Assuming repetition is allowed

Using 5 letter code, we have 26*26*26*26*26 = 26^5
Using 4 letter code, we have 26^4

Total number of products coded = 26^4(27)
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