Question

The ratio of the number of boys to the number of girls in a school is $12:8.$ If the number of boys in the school is $600,$ then the number of girls is

• A. $200$
• B. $400$
• C. $600$
• D. $800$

Answer 1

The correct option is B

$400$

The ratio of the number of boys to the number of girls = $12:8.$

Total number of boys = $600.$

Number of parts representing boys = $12$

Therefore, $12\text{parts}$is equal to $600$

$1$$\text{part}$ is equal to $=\frac{600}{12}=50$

then $8\text{parts}$ is equal to = $50\times 8=400$

Since $8\text{parts}$ represents girls, therefore number of girls is $400$.