Suppose Ruth Ann has 5 routes she can choose from to get from school to the library, and 6 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. 36

b. 30

c. 720

d. 25

This is a straightforward counting problem.

Just multiply the options. There are 5 routes she can take from her school to the library, and 6 possible routes from the library to her home.

Therefore, 5 x 6 = 30 possible routes choice b.

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