Posted by Jen on Saturday, July 23, 2011 at 12:16pm.
A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted?
Oh goodness, I'm not sure what number to start with :(

Math  Reiny, Saturday, July 23, 2011 at 12:37pm
in each position you could place 9 different digits.
So the total number of ways = 9^9 = .....

Math  Jen, Saturday, July 23, 2011 at 12:54pm
9^9 = 387,420,489 different social security numbers are possible??

Math  Reiny, Saturday, July 23, 2011 at 5:15pm
correct

Math  Jen, Saturday, July 23, 2011 at 5:27pm
okay great! thanks :)
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