The ratio of the number of boys to the number of girls in a school of 1650 students is 6: 5. If 124 new boys are admitted and few new girls are admitted, the ratio changes to 4: 3. What is the ratio of the newly admitted girls to the newly admitted boys?

Correct option is D

Let 6x be the number of boys and 5x be the number of girls in the school.
6x+5x=1650
11x=1650
x=150
So, the number of boys is:6x=6×150=900
And the number of girls is:5x=5×150=750

The new number of boys =  $900+124=1024$

$$\frac{1024}{750+g} = \frac{4}{3}$$​

g= 18

Ratio= 18: 124= 9 : 62