Step 1: Calculate the capital employed.
\[
\text{Capital Employed} = \text{Total Assets} - \text{Cash and Bank Balance}
\]
\[
\text{Capital Employed} = ₹9,00,000 - (₹32,000 + ₹1,68,000) = ₹7,00,000
\]
Step 2: Calculate the normal profits.
\[
\text{Normal Profits} = \text{Capital Employed} \times \text{Normal Rate of Return}
\]
\[
\text{Normal Profits} = ₹7,00,000 \times 8% = ₹56,000
\]
Step 3: Calculate the super profits.
\[
\text{Goodwill} = \text{Super Profits} \times \text{Years Purchase}
\]
\[
\text{Super Profits} = \frac{\text{Goodwill}}{\text{Years Purchase}}
\]
\[
\text{Super Profits} = \frac{₹4,00,000}{5} = ₹80,000
\]
Step 4: Calculate the average profits.
\[
\text{Average Profits} = \text{Normal Profits} + \text{Super Profits}
\]
\[
\text{Average Profits} = ₹56,000 + ₹80,000 = ₹1,36,000
\]
Final Answer: The average profits of the firm are \( \boxed{₹1,36,000} \).