Pre Calculus

A travel agent is trying to schedule a client's trip from City A to City B . There are 3 direct flights,3 flights from A to a connecting city C , and 4 flights from this connecting City C to City B .How many trips are possible?

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  1. possible number of routes by connecting city = (3)(4) = 12
    also 3 direct flights, so a total of 15

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