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How many 4-letter code words are possible using the first 8 letters of the alphabet with no letters repeated? how many codes are there when letters are allowed to repeat?

How many 4-letter code words are possible using the first 8 letters of the alphabet with no letters repeated? how many codes are there when letters are allowed to repeat?
asked 28.3k views
3 votes
How many 4-letter code words are possible using the first 8 letters of the alphabet with no letters repeated? how many codes are there when letters are allowed to repeat?

asked
User Josh Beam
by
7.4k points

1 Answer

4 votes
With no letters repeated:
8*7*6*5 = 1680
When letters are allowed to repeat:
8^4 = 4096
answered
User George Wood
by
8.1k points
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