A, B and C are partners. Their capitals are ₹1,00,000, ₹75,000 and ₹50,000 respectively. On C's retirement his share is acquired by A and B in the ratio of 6:4. Gaining ratio will be :

3:2

The correct answer is option 2- 3:2.

Old ratio = 1:1:1 (Nothing mentioned that's why old ratio is equal)

On C's retirement his share is acquired by A and B in the ratio of 6:4.

This acquiring ratio is the gaining ratio.
Gaining Ratio = 6:4
                    = 3:2