The ratio of boys to girls in a school is 7:5. If 20 more girls join the…
2025
The ratio of boys to girls in a school is 7:5. If 20 more girls join the school, the new ratio of boys to girls
becomes 7:6. What is the total number of students in the school initially?
- A.
200
- B.
240
- C.
300
- D.
360
Attempted by 38 students.
Show answer & explanation
Correct answer: B
Let boys:girls initially be 7x:5x. After 20 girls join, 7x:(5x + 20) = 7:6. Hence 6x = 5x + 20, so x = 20 and initial total = 12x = 240.