Which of the following experiments described below can be classified as a binomial experiment?
a) A gambling house advertises the following game. A player rolls two dice. If the sum of the dice is 11 or 12, the house pays the player $10; otherwise, the player pays the house $1. A player pays this games until he has won four times.
b) A sample of 20 families is selected from a list of 150,000 families and the average income per family is computed for the sample.
c) A large state university has over 30,000 undergraduates, 10% of whom are on the dean's list. A sample of five undergraduates will be taken and the number that on the dean's list recorded.
d) A sequence of 10 shots are made at a target. The shooter's initial probability of a bull's-eye is .4, but he expects his probability of obtaining a bull's-eye to go up by about 2% with each shot. He keeps a count of the results.