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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

Solution:

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

R s . (\frac{96}{9}) = R s . \frac{32}{3}

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

R s . (\frac{120}{12}) = R s . 10

∴ Ratio of investments
=

\frac{32}{3}

: 10
= 32 : 30
= 16 : 15

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