A library has fiction books. It has 40 non-fiction books. The number of reference books is 3 times the number of fiction books. If the total number of books is 200, the equation represents this situation. What does the term represent in this equation?
The total number of fiction and non-fiction books.
The number of reference books.
The total number of books in the library.
The number of non-fiction books plus reference books.
