Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.
You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?