Rs. 4800

Rs. 5000

Rs. 5400

Rs. 5600

B. Rs. 5000

Let the investment in 9% stock be Rs. x.

Then, investment in 10% stock = Rs. (9800 - x).

$\frac{9}{75}\times x=\frac{10}{80}\times (9800-x)$

$\Rightarrow \frac{3x}{25}=\frac{9800-x}{8}$

$\Rightarrow $24x = 9800 x 25 - 25x

$\Rightarrow $49x = 9800 x 25

$\Rightarrow $x = 5000.

Rs. 207.40

Rs. 534.60

Rs. 648.00

Rs. 655.60

Rs. 4800

Rs. 5000

Rs. 5400

Rs. 5600

Rs. 12

Rs. 15

Rs. 18

Rs. 21

Rs. 108.25

Rs. 112.20

Rs. 124.75

Rs. 125.25

Rs. 3100

Rs. 6240

Rs. 6500

Rs. 9600

$12\frac{1}{2}\%$

$13\frac{1}{2}\%$

15%

$16\frac{2}{3}\%$

3 : 4

3 : 5

4 : 5

16 : 15

Rs. 5640

Rs. 5760

Rs. 7500

Rs. 9600

Rs. 83.33

Rs. 110

Rs. 112

Rs. 120

Rs. 80

Rs. 96

Rs. 106

Rs. 108

7.5%

8%

9.7%

None of these

11% stock at 143

$9\frac{3}{4}\%stockat117$

Both are equally good

Cannot be compared, as the total amount of investment is not given.

Rs. 95.75

Rs. 96

Rs. 96.25

Rs. 104.25

Rs. 4000

Rs. 4500

Rs. 5500

Rs. 6000

Rs. 48

Rs. 75

Rs. 96

Rs. 133.33