What is the probability that a 7-digit phone number contains at least one 9?

By: USER8699
28 Agustus 2025 mathematics 5 minutes
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Grade: Education Subject: mathematics
What is the probability that a 7-digit phone number contains at least one 9?
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Best Answer
(128)
6279913/10^7

That is what the probability that a 7-digit phone number would contain one singular number.
Answered on 28 Agustus 2025

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