SOLUTION: A person's phone requires a 5 digit password. How many passwords are possible if you can never have the same digit in back to back order?

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Question 955372: A person's phone requires a 5 digit password. How many passwords are possible if you can never have the same digit in back to back order?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
So for the first digit, you have 10 choices.
The next digit, you only have 9 choices.
Similarly for the next 3 positions.
N=10%2A9%2A9%2A9%2A9
N=65610