1.  A man invests some money partly in 9% stock at 96 and partly in 12% stock at 120. To obtain equal dividends from both, he must invest the money in the ratio:
A. 3 : 4
B. 3 : 5
C. 4 : 5
D. 16 : 15

Answer: Option D

Explanation:

For an income of Re. 1 in 9% stock at 96, investment

 = ₹ 96 = ₹ 32
9 3

For an income Re. 1 in 12% stock at 120, investment

= ₹ 120 = ₹ 10.
12

Ratio of investments = 32 : 10 = 32 : 30 
3
 = 16 : 15.