4 ms·
> A personal identification number that opens a certain lock consists of a sequence of 3 DIFFERENT digits from 0 though 9, inclusive. How many possible PINs are
by djaouen 8y ago
> A personal identification number that opens a certain lock consists of a sequence of 3 DIFFERENT digits from 0 though 9, inclusive. How many possible PINs are there?
Do people really struggle with problems like these?