52. Rajinder invests a part of Rs. 12000 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?
A.Rs. 4500 B.Rs. 6000
C.Rs. 5500 D.Rs 4000
Answer: Rs 4000
Explanation: Let investment in 12% stock is Rs. x.
investment in 15% stock Rs. (12000 - x).
(12/120) * x + 15/125(12000-x) = 1360
5x + 72000 -6x hence x = 4000
