Question 4

On day 1, the investor buys $\frac{100}{50} = 2$ units of Stock A and $\frac{80}{80} = 1$ unit of Stock B, for a total cost of $\text{Rs. } 180$. On day 2, the 2 units of Stock A sell for $2 \times 55 = \text{Rs. } 110$, and the 1 unit of Stock B sells for $1 \times 70 = \text{Rs. } 70$. Total revenue is $110 + 70 = \text{Rs. } 180$, so the net profit is $180 - 180 = \text{Rs. } 0$.