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Sakshi invests a part of Rs. 12,000 in 12% stock at Rs. 120 and the remainder in 15% stock at Rs. 125. If his total dividend per annum is Rs. 1360, how much does he invest in 12% stock at Rs. 120?

Options:
A .  Rs. 4000
B .  Rs. 4500
C .  Rs. 5500
D .  Rs. 6000
Answer: Option A

Let investment in 12% stock be Rs. x.


Then, investment in 15% stock = Rs. (12000 - x).


So, \(\frac{12}{120}x\times+\frac{15}{125}x\left(12000-x\right) = 1360.\)


\(\frac{x}{10}+\frac{3}{25}\left(12000-x\right)= 1630.\)


 5x + 72000 - 6x = 1360 x 50


 x = 4000.


 


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