The combined salary of X,Y and Z is Tk. 90, X earns twice of what Z earns, and Y earns 5 times of what Z earns. What is the lowest salary of the three?

A 20,000

B 22,000

C 25,000

D 30,000

Correct Answer: Option A

X:Y:Z = 2:3/2:1 = 4:3:2

now, lowest salary is earned by Z, as we can see from the ratio.

Z's salary = 2*90000/9 = 20000 tk