QA – Placement Quizzes | Ratio and Proportion | Question 3

In a library, the ratio of the books on Computer, Physics and Mathematics is 5:7:8. If the collection of books is increased respectively by 40%, 50% and 75%, find out the new ratio:

(A)

3:9:5

(B)

7:5:3

(C)

2:3:4

(D)

2:5:4

Answer: (C)

Explanation:

40% increase will lead to a factor of 140 and similarly 150 and 175 so new ratio is (5*140):(7*150):(8*175) on solving we get 2:3:4

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