In a certain school, the ratio of boys to girls is 7 : 5. If there are 2400 students in the school, then how many girls are there in the school?
Correct Answer: 1000
Explanation:
Let the number of boys and girls are 7k and 5k, respectively.
Given, total number of students = 2400
⇒ 7k + 5k = 2400
⇒ 12k = 2400
⇒ k = 200
∴ Required number of girls = 5k = 5 x 200 = 1000
