1.  Sakshi invests a part of ₹ 12,000 in 12% stock at ₹ 120 and the remainder in 15% stock at ₹ 125. If his total dividend per annum is ₹ 1360, how much does he invest in 12% stock at ₹ 120?
A. ₹ 4000
B. ₹ 4500
C. ₹ 5500
D. ₹ 6000

Answer: Option A

Explanation:

Let investment in 12% stock be ₹ x.

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

12 x x + 15 x (12000 - x) = 1360.
120 125

x + 3 (12000 - x) = 1360.
10 25

5x + 72000 - 6x = 1360 x 50

x = 4000.