SOLUTION: There are 4 different routes a student can bike from his house to school. In how many ways can he make a round trip if he uses a different route coming than going?

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Question 480448: There are 4 different routes a student can bike from his house to school. In how
many ways can he make a round trip if he uses a different route coming than going?

Answer by Anthea Lawn(22) About Me  (Show Source):
You can put this solution on YOUR website!
There are 4 ways he can cycle to school
If he is to use a different route home then for EACH of these four ways, there will be 3 different ways to cycle home.
So the number of possible round trips is 4 X 3 = 12