Question

During the fall semester marvin latoya and abdulla each read three sevenths of the library books in the classroom.if latoya read 15 books how many library books are in the classroom?

Answer 1

It is known that Latoya read 15 books that is $\dfrac{3}{7}$ of the library books in the classroom.

If $\dfrac{3}{7}$ of all books form 15 books, then $\dfrac{1}{7}$ of all books form 5 books.

If $\dfrac{1}{7}$ of all books form 5 books, then the number of all books in the library can be calculated as $5\cdot 7=35$.

Answer: 35 books.