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?

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (B) 240

ব্যাখ্যা

Correct answer: (B) 240, as per the official SSC answer key. [Quantitative Aptitude]