asasas

\[\left. \begin{array} { l }
\left(\frac{x\times14\times2}{100}\right)+\left(
\frac{\left(13900-x\right)\times11\times2}{100}\right) = 3508 \\
\Rightarrow 28x-22x = 350800 – \left(13900 \times 22 \right)\\
\Rightarrow 6x = 45000 \\
\Rightarrow x = 7500\\
\text{So, sum invested in Scheme B:} \\
= Rs. \left(13900-7500\right) \\
=Rs. 6400
\end{array} \right.\]

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