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Mathematics, 05.05.2020 21:07 almendares55

One day, River writes down the numbers $1,$ $2,$ $\dots,$ $999.$ River chooses one of the digits written down at random. What is the probability that River chooses a $7$?

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One day, River writes down the numbers $1,$ $2,$ $\dots,$ $999.$ River chooses one of the digits wri...

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