59. Rs. 9800 are invested partly in 9% stock at 75 and 10% stock at 80 to have equal amount of incomes. The investment in 9% stock is:
A.Rs. 4800 B.Rs. 5400
C.Rs. 5000 D.Rs. 5600
Answer: Rs. 5000
Explanation: Let the investment in 9% stock is x.
investment in 10% stock = (9800 - x)
9/75 * x = 10/80(9800 - x) hence x = 5000
