If X is 2/5 of Y and Y is 5/7 of Z, what is the ratio of Z:X?

If X is 2/5 of Y and Y is 5/7 of Z, what is the ratio of Z:X?

A 5:7

B 2:7

C 7:5

D 7:2

Solution

Correct Answer: Option D

x=2Y/5 Y= 5Z/7

or, Z=7Y/5

So, (Z:X)=(7Y/5) : (2Y/5)

=(7:2) (Ans.)