Mathematics, 06.05.2020 00:32 IntellTanito

Social security numbers have the form XXX-XX-,
where each X is a digit. How many unique social security
numbers are possible?
A) 100 million
B) almost 400 million
C) 1 billion
D) over 3 billion

Pamela chose B as the correct answer. How did she get that answer?

Please answer both parts.

Answers: 2

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Social security numbers have the form XXX-XX-,
where each X is a digit. How many unique social...

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