Question

The ratio of the number of boys and girls in a college is 3 : 4. If the percentage increase in the number of boys and girls be 60% and 50% respectively, what will be the new ratio?

• A. 4:5
• B. 5 : 4
• C. 4 : 3
• D. 1 : 2

Answer 1

The correct option is A

4:5

Originally, let the number of boys and girls in the college be 3x and 4x respectively.
Their increased number are (160% of 3x) and (150% of 4x)
$\Rightarrow \frac{160}{100}\times 3xand\frac{150}{100}\times 4x\Rightarrow \frac{48x}{10}and\frac{60x}{10}$
So, the required ratio = 48:60 = 4:5