There are 2400 books on literature in the school library, and the number of teaching reference books is 5/6 of that of literature books and 4/4 of that of science books. How many science books are the

Solution: ∫ The number of teaching reference books is 5/6 of that of literature and art books, and there are 2,400 literature and art books ∴ The number of science and technology books is 2,400× 5/6 = 2,000 (books).

* The number of teaching reference books is a quarter of that of science and technology books ∴ 2000 4 = 500 (volumes).

Besides, you missed a few quarters. Anyway, you just have to multiply it by 500.

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