In a school the number of boys and that of the girls are in the respective ratio of 2 : 3. If the number of boys is increased by 20% and that of girls is increased by 10%, what will be the new ratio of number of boys to that of the girls?
In a school the number of boys and that of the girls are in the respective ratio of 2 : 3. If the number of boys is increased by 20% and that of girls is increased by 10%, what will be the new ratio of number of boys to that of the girls?
A14 : 5
B5 : 8
C13 : 4
DNone of these
All DiscussionsClick here to write answer
Correct answer is: None of these
Explanation:
Ratio of no. boys : girls = 2 : 3
Let the no. of boys = 2x
Then the no. of girls = 3x
No. of boys after 20% increase = 1.20 x 2x = 2.4 x.
No. of girls after 10% increase = 1.10 x 3x = 3.3x
Required ratio\(= \frac{2.4x}{3.3x}=\frac{8}{11} = 8 : 11\)
All Comments
Post your answers here:
Post
