posted by slomomo on .
Counting principles and permutations. A social security number consists of 9 digits. How many different social security numbers are possible if repetition of digits is permitted. digits 0-9
I answered this question for you 20 minutes before you reposted it
What part of my answer did you not understand ?
it said 9 digits 0-9
Does this look right if it is 0-9