SOLUTION: Lock combinations are made by using 4 digits. How many different lock combinations can be made if repetition of digits is allowed?

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Question 302739: Lock combinations are made by using 4 digits. How many different lock combinations can be made if repetition of digits is allowed?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Assumption is 0 to 9 are the digits allowed for use.
That's 10 in total for each of the 4 positions.
N=10*10*10*10=10,000 combinations