Question

Seats for Mathematics, Physics and Biology in a
school are in the ratio 5:7:8. There is a proposal to
increase these seats by 40%, 50% and 75%
respectively. What will be the ratio of increased
seats?​

Answer 1

Answer: Option A

Step-by-step explanation:

Originally, let the number of seats for Mathematics, Physics and Biology be 5x, 7x and 8x respectively.

Number of increased seats are (140% of 5x), (150% of 7x) and (175% of 8x).

 140  x 5x   ,   150  x 7x   and   175  x 8x  

100  100  100

7x,  21x  and 14x.

2

The required ratio = 7x :  21x  : 14x

2

14x : 21x : 28x

2 : 3 : 4.