Question

In a school 10% of number of girls is equal to 1/20 of number of boys . Find the ratio between the number of boys to the number of girls .

Answer 1

Answer:

Let the number of boys be x and number of girls be y.

It is given that 10% of number of girls is equal to the 1/20th of number of boys.

Then,

$\\ \sf \: y \times \dfrac{ 1\cancel{0}}{10 \cancel{0}} = \dfrac{x}{20} \\ \\ \\ \implies \sf \dfrac{y}{10} = \dfrac{x}{20} \\ \\ \\ \implies \sf \: \dfrac{x}{y} = \frac{20}{10} \\ \\ \\ \implies \sf \blue{ 2 : 1}$

Therefore, ratio between the number of boys to the number of girls is 2 : 1.

Answer 2

Answer:

2:1

Please refer to the pic for answer