Question

There are m boys and n girls in a class. If total number of boys in the class
Is 24 and the ratio of number of boys to the total number of students in
the class is 4:7, then find the number of girls in the class,​

Answer 1

Step-by-step explanation:

let number of boys and total number of students be 4x and 7x

According to question

number of boys = 4x = 24

x = 24/4

x = 6

then total number of students = 7×6 = 42

Number of girls = total number of students - number of boys

= 42 - 24

= 18

Answer 2

Answer:

The number of girls among the total students in the class is 18

Step-by-step explanation:

Given, there are 24 boys in the class

also, ratio of  number of boys to the total number of students in the class is 4:7

Let the total number of students (boys+ girls) in the class be x

⇒  $\frac{24}{x}=\frac{4}{7}$ ⇒ x = $\frac{24(7)}{4}$

total students (x) = 42

So, total number of students in the class = 42  

Then, the number of girls in the class = total number of students- number of boys = 42-24 = 18

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