Distinct-Digit Positive Numbers

Discrete Mathematics Level 2

How many 3-digit positive numbers are there that comprise of 3 distinct digits?

Details and assumptions

The number \(12=012\) is a 2-digit number, not a 3-digit number.

2 digits are distinct if they are not the same. The number 121 is not comprised of 3 distinct digits, as the first and third are the same.


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