The ratio of boys and girls in a college was 4 : 5. New students got admitted and the number of boys went up by 50% and the number of girls went up by 60%. What is the new ratio of boys and girls in the college?

The ratio of boys and girls in a college was 4 : 5.

Let's assume the number of boys and girls in a college was 4y and 5y respectively.

New students got admitted and the number of boys went up by 50% and the number of girls went up by 60%.

number of boys after new admission = 4y of (100+50)%

= 4y of 150%

= 6y

number of girls after new admission = 5y of (100+60)%

= 5y of 160%

= 8y

New ratio of boys and girls in the college = 6y : 8y

= 3 : 4