Find the number of possible 9- digit social security numbers if the digits may be repeated

asked Jul 18, 2018 176k views

4 votes

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2 votes

number of possible 9- digit social security numbers=10^9

Cowborg answered Jul 20, 2018

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2 votes

there are 1 billion 9 digit combinations (000-00-0000 through 999-99-9999)

Maher HTB answered Jul 22, 2018

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