Question

the ratio of boys and girls in a class is 11:7 find the number of girls if the total number of students in the class is 72

Answer 1

Answer:

28 girls

Step-by-step explanation:

Let the ratios be 11x and 7x

Now,

total no. of students are 72

11x+7x =72

18x= 72

x=72/18

x=4

and now when we put the value of x in tye ratios we will get the no. of girls and also the boys

*no. of boys = 11x

11×4= 44 boys

* no. of girls =7x

7× 4=28 girls

And u can rectify ur answer by adding the no. of girls and boys

44+28= 72 which was the total no. of students

so ur answer is 100% coreect

Answer 2

Given:

The ratio of boys to girls = 11:7

Total number of students = 72

To Find:

Total number of girls

Solution:

Let the number of boys be = 11x

Let the number of girls be = 7x

Now, According to the question -

11x + 7x = 72

18x = 72

x = 72/18

x = 4

Substituting the values -

Number  girls = 7x

= 7 × 4

= 28

Answer: The number of girls in the class is 72.