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Exercise 7.6 · Q3

Q.Which is better investment 11% stock at 143 or 9 ¾% stock at 117

Sikkim CbseNCERTSubjective· 3mImportance★★★★★est
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The key is to compare the effective yield (return per rupee invested) of each stock. The 9¾% stock at 117 gives a higher yield (≈ 8.33%) than the 11% stock at 143 (≈ 7.69%), so the 9¾% stock at 117 is the better investment.

Why Yield Matters, Not Just the Dividend Rate

When comparing stocks, the dividend percentage (like 11% or 9¾%) is misleading — it’s a percentage of the face value (usually ₹100), not of the price you actually pay. What you care about is: for every ₹100 I invest, how much do I earn? That’s the yield.

Yield=Annual dividend per shareMarket price per share×100%\text{Yield} = \frac{\text{Annual dividend per share}}{\text{Market price per share}} \times 100\%

The face value of a stock is typically ₹100 unless stated otherwise. So “11% stock” means ₹11 dividend per year on a ₹100 face-value share, but you buy it at ₹143. Similarly, “9¾% stock” means ₹9.75 dividend per year, bought at ₹117.


Step-by-Step Comparison

1. Calculate the annual dividend for each stock

  • For the 11% stock: dividend = 11% of ₹100 = ₹11 per share.
  • For the 9¾% stock: dividend = 9.75% of ₹100 = ₹9.75 per share.

2. Compute the yield for the 11% stock at 143

You pay ₹143 to get ₹11 per year.

Yield1=11143×100%=1100143%\text{Yield}_1 = \frac{11}{143} \times 100\% = \frac{1100}{143}\%

Simplify: 143×7=1001143 \times 7 = 1001, so 1100÷143≈7.6923%1100 \div 143 \approx 7.6923\%.

Tip

A quick check: 11/143=1/13≈0.0769211/143 = 1/13 \approx 0.07692, so yield ≈ 7.69%. That’s a clean fraction — useful for mental math.

3. Compute the yield for the 9¾% stock at 117

You pay ₹117 to get ₹9.75 per year.

Yield2=9.75117×100%=975117%\text{Yield}_2 = \frac{9.75}{117} \times 100\% = \frac{975}{117}\%

Simplify: divide numerator and denominator by 3: 975÷3=325975 \div 3 = 325, 117÷3=39117 \div 3 = 39. So 32539%\frac{325}{39}\%.

Now 39×8=31239 \times 8 = 312, remainder 13, so 325/39=8.3333...%325/39 = 8.3333...\%. …

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