Mathematics, 01.02.2021 19:30 KenzieD7876

1. A lock has four dials. On each dial are the digits 0 to 9. Numbers cannot be repeated. How many possible combinations are there?
2.
License plates have 3 letters followed by 3 numbers. The same letter CANNOT be repeated. How many different license plates can be made?
3.
A website requires users to set up an account that is password protected. If the password format is four letters followed by a single digit number, how many different passwords are possible?

Answers: 2

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1. A lock has four dials. On each dial are the digits 0 to 9. Numbers cannot be repeated. How many...