SOLUTION: how many four digit numbers can be made using only the odd digits if repetition is allowed? Repetition is not allowed?

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Question 956720: how many four digit numbers can be made using only the odd digits if repetition is allowed? Repetition is not allowed?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+5%5E4+=+625+ if repetition is allowed
+5%2A4%2A3%2A2+=+120+ if repetition is not allowed