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1. Study the following graph carefully to answer the questions that follow:
Monthly income (Rs. in thousands) of three different persons in six different years

What was the percentage increase in the monthly income of Jyoti in the year 2008 as compared to previous year ?

A. 50%

B. 89%

C. 83%

D. 67%

Solution:

Jyoti's income in 2008 = Rs. 27000
Jyoti's income in 2007 = Rs. 18000
∴ Increase percentage

\begin{aligned} = \frac{2700 - 1800}{18000} \times 100 \\ = \frac{9000}{18000} \times 100 \\ = 50 % \end{aligned}

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