Suppose Ruth Ann has 3 routes she can choose from to get from school to the library, and 5 routes from the library to her home. How many routes are there from Ruth Ann’s school to her home with a stop at the library?
(A)60
(B)15
(C)25
(D)9

Question

Suppose Ruth Ann has 3 routes she can choose from to get from school to the library, and 5 routes from the library to her home. How many routes are there from Ruth Ann’s school to her home with a stop at the library?
(A)60
(B)15
(C)25
(D)9

hero · Answer

Apply the Multiplication Principle of Counting. If there are m ways to do one thing, and n ways to do another thing, then there are m x n ways to do either thing.

anonymous · Answer

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