Current location - Training Enrollment Network - Books and materials - In the school library, there are 70 fewer science and technology books than fairy tales, and the ratio of science and technology books to fairy tales is 3: 5. How many books are there in the library?
In the school library, there are 70 fewer science and technology books than fairy tales, and the ratio of science and technology books to fairy tales is 3: 5. How many books are there in the library?
70÷ (5-3) = 35 (Ben) So, this is a copy.
Science and technology book: 35× 3 = 105 (this),
Fairy Tale Book: 35× 5 = 175 (Ben).
A * * *: 105+ 175 = 280 (this number)
There are 280 books on science and fairy tales in the library.