The library at school is organized by fiction and nonfiction books. there are 3 non-fiction books for every 7 fiction books how many total books are there in the library had 240 nonfiction books

You can set up a proportion for this problem. Let the total number of books = x

The number of non-fiction books to the total number of books is

3/(7 + 3) books = 3/10

3/10 = 240/x                       Cross multiply

3x = 240 * 10                      Combine the right

3x = 2400                           Divide by 3

3x/3 = 2400/3                    Divide

x = 800

800 books in total.

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Step-by-step explanation: