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 ?
Options:  A) 1:2:3  B) 2:3:4  C) 3:4:5  D) 4:5:6  E) None of these
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).   ⇒ [(140/100) × 5x],[(150/100) × 7x] and [(175/100) × 8x] ⇒ 7x, 21x/2 and 14x.   ⇒ The required ratio =7x : 21x/2 : 14x   ⇒ 14x : 21x : 28x   ⇒ 2 : 3 : 4   Answer: 2:3:4
<result>B</result>
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 ?