Question

number of boys and girls in a class are in the ratio of 7:5 the number of boys is 8 more than the number of girls what is the total of class strength

Answer 1

Let the number of boys be 7a

Number of girls = 5a

According to question,

7a - 5a = 8

=> 2a = 8

=> a = 4

Number of boys = 7 × 4 = 28

Number of girls = 5 × 4 = 20

Total number of students = 28 + 20 = 48

Answer 2

Answer:

Let the number of boys be 7x and girls be 5x.

According to the question,

7x = 5x + 8

⇒ 7x – 5x = 8

⇒ 2x = 8

⇒ x = 8/2

⇒ x = 4

Therefore, Number of boys = 7×4 = 28

And, Number of girls = 5×4 = 20

Total number of students = 20+28 = 48