We need to find the gaining ratio of Sudama and Varun after Sharma's retirement.
Step 1: Understand the concept of gaining ratio.
Gaining ratio is the ratio in which the continuing partners gain the share of the retiring partner. It is calculated as:
\[
\text{Gaining Ratio} = \text{New Share} - \text{Old Share}
\]
Step 2: Identify the old profit sharing ratio.
Old ratio of Sudama : Sharma : Varun = 6 : 4 : 3
Total of old ratio = 6 + 4 + 3 = 13
- Sudama's old share = \(\frac{6}{13}\)
- Sharma's old share = \(\frac{4}{13}\)
- Varun's old share = \(\frac{3}{13}\)
Step 3: Determine the new ratio after retirement.
When a partner retires, the remaining partners continue with each other. Unless specified otherwise, they continue in their old ratio. So, Sudama and Varun will share profits in their old ratio of 6 : 3, which simplifies to 2 : 1.
New ratio of Sudama : Varun = 2 : 1
- Sudama's new share = \(\frac{2}{3}\)
- Varun's new share = \(\frac{1}{3}\)
Step 4: Calculate the gaining ratio.
\[
\text{Gain} = \text{New Share} - \text{Old Share}
\]
For Sudama:
\[
\text{Gain} = \frac{2}{3} - \frac{6}{13} = \frac{26 - 18}{39} = \frac{8}{39}
\]
For Varun:
\[
\text{Gain} = \frac{1}{3} - \frac{3}{13} = \frac{13 - 9}{39} = \frac{4}{39}
\]
Gaining ratio = \(\frac{8}{39} : \frac{4}{39} = 8 : 4 = 2 : 1\)
Final Answer: (B) 2 : 1