Why there is a difference of 1 rupee.

Question

One man is selling 30 eggs at 1 rs for 3 and he is getting 10 rs and another man is selling same 30 eggs at 1rs for 2 and he is getting 15 rs. Both combine will get 25 rs and if both are selling by combining there 60 eggs at 2rs for 5 then they are getting 24 rs. Why there is a difference of 1 rupee.

Answer 1

There is no difference of 1 rupee.  The 2 rs value is incorrect.

The first man is getting 1/3 rs per egg.

The second man is getting 1/2 rs per egg.

Combined, they are getting (1/3 + 1/2) / 2 = 5/12 rs per egg.

Their average price is 5 rs per 12 eggs, not 2 rs per 5 eggs.

When they sell 60 eggs, they get 60 (5/12) = 25 rs.

No missing rupee.