Question

The ratio of maths and science books in a school library is 4:5

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. If the number of science books is 75, find the number of maths books. ​​

Answer 1

Answer:

The ratio of maths and science books in a school library is 4:5

And the number of science books is 75.

let, the number of math books is p.

From the given question,

p/75 = 4/5

or, p={(75 /5) x4)}

or, p=60

the number of math books is 60.

Answer 2

Answer:

let the number science and maths books be 4x and 5x.

no. of science books is 75 so

$75 = 5x$

$x = \frac{75}{5}$

$x = 15$

no. of maths book is

$= 4x$

$= 4 \times 15$

$= 60$

no. of maths book is 60

no. of science books is 75

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