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

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User Larusso
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2 Answers

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

answered
User Cowborg
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7.8k points
2 votes
there are 1 billion 9 digit combinations (000-00-0000 through 999-99-9999)

answered
User Maher HTB
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8.7k points

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