3. Model Trains Jenny’s model train has a circular track. Six telephone poles are spaced evenly around the track. The engine of Jenny’s train takes 10 seconds to go from the first pole to the third pole. How long would it take the engine to go all the way around the track?

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Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −