The conversation between human and AI assistant.
Given 9 digits to work with, how many possible combinations of 3 digits are there?
Okay, that makes sense. Can you give me an example of when knowing the possible combinations of digits would be useful?
Sure! Let's say you were creating a password for a computer system, and the password needed to be 3 digits long. You could use the 9 digits to create 84 possible combinations for your password, which would make it much harder for someone to guess your password than if you only used one or two digits.