Question : In a school, there were 1554 students, and the ratio of boys to girls was 4 : 3. After a few days, 30 girls joined the school but a few boys left. As a result, the ratio of boys and girls became 7 : 6. The number of boys who left the school is:

Question : The ratio of the number of boys to the number of girls in a school of 432 pupils is 5 : 4. When some new boys and girls are admitted, the number of boys increases by 12 and the ratio of boys to girls changes to 7 : 6. The number of new girls admitted is:

Question : The ratio of boys and girls in a school is 27 : 23. If the difference between the number of boys and girls is 200, then find the number of boys.

Question : The ratio of the number of boys in a school to the total number of boys and girls in that school is 7 : 17. If the number of boys in that school is 1099, then how many girls are there in that school?

Question : In a college union, there are 48 students. The ratio of the number of boys to the number of girls is 5 : 3. What is the number of girls to be added to the union so that the ratio of boys to girls is 6 : 5?