Question

How many three digit passwords can be made if digits may be repeated

Answer 1

If passwords can start with 0, then total nos from 000 to 999,
If not, then all possible 3 digit nos.

Answer 2

what digits can you use?

Answer 3

There are 10 digits from 0 to 9.
The number of different permutations of n different things taken k at a time with repetitions is\[n ^{k}=10^{3}\]

Answer 4

1