Question : The ratio of the number of boys and girls in a school of 720 students is 7 : 5. How many more girls should be admitted to make the ratio 1 : 1?
Option 1: 90
Option 2: 120
Option 3: 220
Option 4: 240
New: SSC CHSL tier 1 answer key 2024 out | SSC CHSL 2024 Notification PDF
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
Correct Answer: 120
Solution :
The current ratio of boys to girls in the school is 7 : 5.
This means that out of every 12 students (7 boys + 5 girls), 7 are boys and 5 are girls.
The number of boys and girls in the school is 720.
Number of boys = $\frac{7}{12}×720 = 420$
Number of girls = $\frac{5}{12}×720 = 300$
To make the ratio of boys to girls 1 : 1, the number of girls should be equal to the number of boys.
Additional girls needed = Number of boys – Number of girls = 420 – 300 = 120
Hence, the correct answer is 120.
Related Questions
2 Views
Know More about
Staff Selection Commission Combined High ...
Result | Eligibility | Application | Admit Card | Answer Key | Preparation Tips | Cutoff
Get Updates Brochure
Your Staff Selection Commission Combined Higher Secondary Level Exam brochure has been successfully mailed to your registered email id “”.
