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Mathematics, 24.06.2019 13:30 livagrace

Elizabeth lives in san francisco and works in mountain view. in the morning, she has 33 transportation options (take a bus, a cab, or a train) to work, and in the evening she has the same 33 choices for her trip home. if elizabeth randomly chooses her ride in the morning and in the evening, what is the probability that she'll use a cab exactly one time?

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