Two egg sellers are sitting on the table. One seller has 7 eggs and other has 5 eggs. One of the common friends of both passing by requested them to share their food in return for money. The three of them shared the eggs equally and the third friend paid the other two a total of Rs.24.Find the difference between the amounts received by two sellers.

Total eggs = 7 + 5 = 12. Shared equally among 3 people means each gets 12/3 = 4 eggs worth. Seller 1 (7 eggs) gives away 7 - 4 = 3 eggs worth. Seller 2 (5 eggs) gives away 5 - 4 = 1 egg worth. Total payment of Rs.24 should be split in ratio 3:1. Seller 1 gets (3/4) × 24 = Rs.18. Seller 2 gets (1/4) × 24 = Rs.6. Difference = 18 - 6 = Rs.12, which matches option D.