Question:
The salaries of Ramesh, Ganesh and Rajesh were in the ratio 6:5:7 in 2010, and in the ratio 3:4:3 in 2015. If Ramesh’s salary increased by 25% during 2010-2015, then the percentage increase in Rajesh’s salary during this period is closest to
- 8
- 7
- 9
- 10
Correct Answer: Option: 2
Let their salaries in 2010 be 6x, 5x and 7x respectively.
Also, let their salaries in 2015 be 3y, 4,y and 3y respectively
Given, $3y = 1.25 \times 6x$
Or y = 2.5x.
Therefore, salary of Rajesh in 2015 = $3y = 3 \times 2.5x=7.5x$
Percentage increase = $\left( \frac{7.5x-7x}{7x} \right)\times 100\approx 7%$
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