The conversation between human and AI assistant.
Given 9 digits to work with, how many possible combinations of 3 digits are there?
That's helpful. Is there a way to calculate the number of combinations if we have a different number of digits to work with?
Yes, absolutely! The formula is the same, but you just need to substitute in the appropriate numbers for n and r. For example, if you had 12 digits and wanted to know the number of possible combinations of 4 digits, the formula would be 12C4 = 12!/4!(12-4)! = 495. So there would be 495 possible combinations in that case.