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Lizzie needs to catch a train. The train arrives randomly some time between 2:00 and 3:00, waits for 20 minutes, and then leaves. If Lizzie also arrives randomly between 2:00 and 3:00, what is the probability that the train will be there when Lizzie arrives?

 Apr 19, 2020
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The probability is 5/18.

 May 24, 2020

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