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?

Answer 1

15 if you use the tree method the you would do 1 2 & 3 and you would put the 5 routes from the library to her home  on each number and get the answer

Answer 2

Answer: There are 15 routes from Ruth Ann's school to her home with a stop at the library

Explanation:

Since we have given that

Number of routes she can choose Ruth Ann from to get from school to the library = 3

Number of routes she can choose Ruth Ann from to get from the library to her home = 5

Number of routes from Ruth Ann's school to her home with a stop at the library is given by

$3\times 5=15$

Hence, there are 15 routes from Ruth Ann's school to her home with a stop at the library.