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1. The graph shows the exchange reserve of a country in difference years. Study the graph and answer the questions.

The percentage increase in the foreign exchange reserves in 1997 - 98 over 1993 - 94 is:

A. 100%

B. 150%

C. 200%

D. 120%

Solution:

\begin{aligned} Reserve in 1993 - 94 = 2520 \\ Reserve in 1997 - 98 = 5040 \\ Increase % \\ = \frac{5040 - 2520}{2520} \times 100 % \\ = \frac{2520}{2520} \times 100 \\ = 100 % \end{aligned}

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