SOLUTION: A social security number consists of nine digits. How many different social security numbers are possible if repetition of numbers is permitted? How do I know what formula I should
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Question 444758: A social security number consists of nine digits. How many different social security numbers are possible if repetition of numbers is permitted? How do I know what formula I should be using?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
There is not much of a formula; much of it is intuition and logic.
There are ten possible choices for each digit, and nine digits. The number of possible SSN's is 10x10x10x...x10 = 10^9.
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