# Math

A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted?

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1. in each position you could place 9 different digits.
So the total number of ways = 9^9 = .....

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2. 9^9 = 387,420,489 different social security numbers are possible??

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3. correct

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4. okay great! thanks :)

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