# College Mathematics

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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 -

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 -

it said 9 digits 0-9

• College Mathematics -

Does this look right if it is 0-9
26*26*10*10*10*10=6,760,000

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