SOLUTION: How many ways can a 4 digit password be formed If repetition is not allowed? If repetition is allowed?

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Question 1075234: How many ways can a 4 digit password be formed
If repetition is not allowed?

If repetition is allowed?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Repetition,
N=10%2A10%2A10%2A10=10000
No Repetition,
N=10%2A9%2A8%2A7=5040