Math problems, there are many books in the library, among which the ratio of literature and art books to science and technology books is 4:5, and the ratio of men and women borrowing 280 science and technology books is 6; 5. Ask men and women how much to borrow. If there is no mistake, the male loan is (280*9/5)*(6/ 1 1). But the situation seems to be inseparable, so the proportion of men and women borrowing books in your topic is only the proportion of technology or the overall proportion, and the other is whether there are other books in the library and so on. Generally speaking, your topic description is very imprecise and unclear.