Posted by **slomomo** on Monday, March 18, 2013 at 2:09pm.

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

- College Mathematics -
**Reiny**, Monday, March 18, 2013 at 2:21pm
I answered this question for you 20 minutes before you reposted it

http://www.jiskha.com/display.cgi?id=1363627561

What part of my answer did you not understand ?

- College Mathematics -
**slomomo**, Monday, March 18, 2013 at 2:31pm
it said 9 digits 0-9

- College Mathematics -
**slomomo**, Monday, March 18, 2013 at 2:37pm
Does this look right if it is 0-9

26*26*10*10*10*10=6,760,000

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