Question

In a school library, the ratio of Mathematics books to Science books is the same as the ratio of Science books to Hindi books. If there are 450 books in Science and 300 books in Hindi, find the number of books in Mathematics.

Answer 1

Ratio of Science to Hindi books-450: 300=3: 2
Ratio of Mathematics to Science books=3: 2
3 parts =450 books
1 part =150 books
2 parts=300 books.
So your answer is 300 books
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Answer 2

Ratio of science: Hindi =450:300=3:2

ATQ
ratio of Mathematics: Science = 3:2

2k =450

k=225

3k= 675

so number of books of mathematics =675