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Home Aptitude Ratio and Proportion Comments

  • 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 ?


  • Options
  • A. 1:2:3
  • B. 2:3:4
  • C. 3:4:5
  • D. 4:5:6

  • Correct Answer
  • 2:3:4 

    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


  • Ratio and Proportion problems


    Search Results


    • 1. In a zoo, there are rabbits and pigeons. If heads are counted, there are 340 heads and if legs are counted there are 1060 legs.How many pigeons are there?

    • Options
    • A. 120
    • B. 150
    • C. 170
    • D. 180
    • Discuss
    • 2. A sum of Rs. 427 is to be divided among A, B and C such that 3 times A?s share, 4 tunes B?s share and 7 times C?s share are all equal. The share of C is :

    • Options
    • A. 84
    • B. 140
    • C. 196
    • D. 240
    • Discuss
    • 3. If 0.75: x :: 5:8, then x is equal to:

    • Options
    • A. 1.12
    • B. 1.16
    • C. 1.20
    • D. 1.30
    • Discuss
    • 4. Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

    • Options
    • A. 10 : 5
    • B. 15 : 2
    • C. 20 : 2
    • D. 25 : 2
    • Discuss
    • 5. The compounded ratio of (2 : 3), (6: 11) and (11 :2) is

    • Options
    • A. 1:2
    • B. 2:1
    • C. 11:24
    • D. 36:121
    • Discuss
    • 6. The third proportional to 9 and 12 is ?

    • Options
    • A. 14
    • B. 16
    • C. 18
    • D. 20
    • Discuss
    • 7. The salaries of A, B, and C are in the ratio of 1 : 2 : 3. The salary of B and C together is Rs. 6000. By what percent is the salary of C more than that of A?

    • Options
    • A. 100 %
    • B. 200%
    • C. 300%
    • D. 600%
    • Discuss
    • 8. A dog takes 3 leaps for every 5 leaps of a hare. If one leap of the dog is equal to 3 leaps of the hare, the ratio of the speed of the dog to that of the hare is :

    • Options
    • A. 9:5
    • B. 2:3
    • C. 4:7
    • D. 5:6
    • Discuss
    • 9. In a college, the ratio of the number of boys to girls is 8 : 5. If there are 160 girls, the total number of students in the college is

    • Options
    • A. 100
    • B. 250
    • C. 260
    • D. 416
    • Discuss
    • 10. The concentration of petrol in three different mixtures (petrol and kerosene) is 1/2 , 3/5 and 4/5 respectively. If 2 litres, 3 litres and 1 litre are taken from these three different vessels and mixed. what is the ratio of petrol and kerosene in the new mixture?

    • Options
    • A. 4:5
    • B. 3:2
    • C. 3:5
    • D. 2:3
    • Discuss


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