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I sold two watches for Rs. 300 each, one at loss of 20% and other at the profit of 20%. What is the percentage of loss (-) or profit (+) that resulted from the transaction?

A. (+)4 B. (-)1 C. (+)1 D. (-)4 Answer: Option D
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Solution(By Apex Team)

In such cases, always loss occurs. It can be calculated by this formula, $\begin{array}{l}=\frac{\text{ (loss or gain percentage) }^2}{100}=4\\ i.e\ 4\%\ \text{of loss}\end{array}$

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