Question: Avery sets up a passcode on her tablet, which allows only eight-digit codes. She has heard that it's more secure if a digit is repeated

Avery sets up a passcode on her tablet, which allows only eight-digit codes. She has heard that it's more secure if a digit is repeated in the passcode. A spy sneaks a look at Avery's tablet and sees her fingerprints on the screen over seven numbers. What is the probability the spy is able to unlock the tablet on his first try? Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.

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