In a school there were 550 students and the ratio of boys and girls was 6:5. After some time 50 girl students joined the school but few boys left the school. As a result,the ratio of boys and girls became 11:12 .Find how many boys left the school.

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

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

The total number of students in a school was 660. The ratio of number of boys and girls was 13 : 9. After some days, 30 girls joined the school and some boys left. The new ratio of number of boys and girls became 6:5. Find the number of boys who left the school.

The total number of students in a school was 660 .the ratio of number of boys and girls was 13 :9 After some days , 30 girls joined the school and some boys left .The new ratio of number of boys and girls became 6:5 Find the number of boys who left the school .

The total number of students in a school was 660 .The ratio of number of boys and girls was 13:9 After some days , 30 girls joined the school and some boys left .the new ratio of number of boys and grils became 6:5 .Find the number of boys who left the school .

In a certain school the ratio of boys to girls is 7 : 5. If there are 2400 students in the school, how many boys are there ?

In a school there are 650 students. The ratio of the boys to that fo the girls is 8:5. How many more girls should join the school so that the ratio becomes 4:3?

In a certain school, the ratio of boys to girls is 7:5 . If there are 2400 students in the school, then how many girls are there ?