প্রশ্ন সংশোধন করুন
প্রশ্ন:
The ratio of boys and girls in a class is 4:5. If 10% of the boys and 20%of the girls failed In an examination,what percentage of students passed in the exam?
The ratio of boys and girls in a class is 4:5. If 10% of the boys and 20%of the girls failed In an examination,what percentage of students passed in the exam?