(1) 2250× 50% =1125 (only)

2250×30%=675 (only)

A: This poultry farmer has raised 1 125 chickens and 675 ducks.

Question 2: Total number of people: 2÷5%=40 (people)

Qualified number: 40×25%= 10 (person)

Excellent number: 40×30%= 12 (person)

Good number: 40×40%= 16 (person)