A farmer bought chickens and ducks to restock his farm. He also purchased milking cows for his wife’s milk-making enterprise. The total cost was $11425. He remembered that the 50 chickens cost $65 each and the cows cost $45 each. He counted 10 ducks in the paddock, but he could not remember what they cost. His wife reminded him that the total number of animals he bought was 75.
Work out for the farmer the price for each duck.