1.  Which is better investment: 11% stock at 143  or  9% stock at 117?
A. 11% stock at 143
B. 9(3/4)% stock at 117
C. Both are equally good
D. Cannot be compared, as the total amount of investment is not given.

Answer: Option B

Explanation:

Let investment in each case be ₹ (143 x 117).

Income in 1st case = ₹ 11 x 143 x 117
143
= ₹ 1287.

Income in 2nd case = ₹ 39 x 143 x 117
4 x 117
= ₹ 1394.25

Clearly, 9 3 % stock at 117 is better.
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