Bindu lends Rs. 10000 in four parts to her fr | vedclass

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(C) Total amount lent = $Rs. 10000$.Average interest rate = $8.13 \%$.Total interest earned = $\frac{10000 	imes 8.13}{100} = Rs. 813$.Interest from

Vedclass · Accepted Answer

$9$

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(C) Total amount lent = $Rs. 10000$.Average interest rate = $8.13 \%$.Total interest earned = $\frac{10000 	imes 8.13}{100} = Rs. 813$.Interest from first part = $8 \%$ of $2000 = \frac{8}{100} 	imes 2000 = Rs. 160$.Interest from second part = $7.5 \%$ of $4000 = \frac{7.5}{100} 	imes 4000 = Rs. 300$.Interest from third part = $8.5 \%$ of $1400 = \frac{8.5}{100} 	imes 1400 = Rs. 119$.Sum of interest from these three parts = $160 + 300 + 119 = Rs. 579$.Remaining amount = $10000 - (2000 + 4000 + 1400) = 10000 - 7400 = Rs. 2600$.Interest required from the remainder = $813 - 579 = Rs. 234$.Let the rate of interest for the remainder be $y \%$.Then,$\frac{y}{100} 	imes 2600 = 234$.$26y = 234$.$y = \frac{234}{26} = 9$.Therefore,the required interest rate is $9 \%$.

Bindu lends $Rs. 10000$ in four parts to her friends. If she gets $8 \%$ on $Rs. 2000$,$7.5 \%$ on $Rs. 4000$ and $8.5 \%$ on $Rs. 1400$,what percent must she get for the remainder,if the average interest is $8.13 \%$?

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