SOLUTION: there are four bus lines between a and b and 3 lines between b and c. find the number of ways that a man can travel by bus roundtrip from a to c by way of b

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Question 962401: there are four bus lines between a and b and 3 lines between b and c. find the number of ways that a man can travel by bus roundtrip from a to c by way of b
Answer by stanbon(75887) About Me  (Show Source):
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Permutations/962401 (2015-04-11 00:38:14): there are four bus lines between a and b and 3 lines between b and c. find the number of ways that a man can travel by bus roundtrip from a to c by way of b
And::: 4*3 = 12 ways
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Cheers,
Stan H.