Question

The ratio of Maths and Science books in a school library is 4:5. If the number of Science books is 75, find the number of Maths books.

Answer 1

Given that:

• The ratio of Maths and Science books in a school library is 4:5.
• The number of Science books is 75.

To Find:

• The number of Maths books.

Let us assume:

• The number of Maths books be x.

According to the question.

Maths Books : Science Books = 4 : 5

ㅤ↠ㅤx : 75 = 4 : 5

ㅤ↠ㅤx/75 = 4/5

ㅤ↠ㅤ5x = 4(75)

ㅤ↠ㅤ5x = 300

ㅤ↠ㅤx = 300/5

ㅤ↠ㅤx = 60

Hence,

• The number of Maths books is 60.