### An amount of Rs. 680 was invested at 6% rate of interest and another sum of money was invested at 10% interest. If the average interest on the total at the end of the year was 7.5%, how much was invested at 10%?

A. Rs. 408 B. Rs. 412.6 C. Rs. 267.5 D. None of these Answer: Option A
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### Solution(By Apex Team)

\begin{aligned}&\text{ Now, }\frac{680}{x}=\frac{2.5}{1.5}\\ &\text{ Or, }x=\frac{680\times3}{5}\\ &\text{ Hence, }x=\text{ Rs. }408\end{aligned}

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