The ratio of the number of boys and girls in a college is 6 : 7. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 72 : 77
The ratio of the number of boys and girls in a college is 6 : 7.
Let number of boys and girls in a college be 6x and 7x.
A/c to question,
⇒ New ratio = {6x + (20% of 6x)} : {7x + (10% of 7x)} = ?
⇒ New ratio = (6x + 1.2x) : (7x + 0.7x)
⇒ New ratio = 7.2x : 7.7x = 72 : 77