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-

Question: 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-

Solution:
For an income of Tk. 1 in 9% stock at 96,
investment = Tk. (96/9​) = Tk. 32/3​

For an income of Tk. 1 in 12% stock at 120,
investment = Tk. 120/12 = Tk. 10

∴ Ratio of investments =32/3 ​: 10 = 32 : 30 = 16 : 15