SOLUTION: Four commuter trains and five express buses depart from city A to City B in the morning, and three commuter trains and four express buses operate on the return trip in the evening.

Question 674007: Four commuter trains and five express buses depart from city A to City B in the morning, and three commuter trains and four express buses operate on the return trip in the evening. In how many ways can a commuter from City A to City B complete a daily round trip via bus and/or train?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Four commuter trains and five express buses depart from city A to City B in the morning, and three commuter trains and four express buses operate on the return trip in the evening. In how many ways can a commuter from City A to City B complete a daily round trip via bus and/or train?
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The commuter can go from A to B in 9 ways,
and can go from B to A in 7 ways.
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# of ways to make the roundtrip = 9*7 = 63
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cheers,
Stan H.
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