Question

a population consistent of two numbers (3,7) consider all possible samples of size n=3 which can be drawn with replacement from the population

Answer 1

Since there are two numbers and sample of size three wih replacement, then there are totally $2^3=8$ such samples. They are lised below

(3, 3, 3); (3, 3, 7); (3, 7, 3); (7, 3, 3); (3, 7, 7); (7, 3, 7); (7, 7, 3); (7, 7, 7)