A sign on the pumps at a gas station encourages customers to have their oil checked, and claims that one out of 4 cars needs to have oil added. If this is true, what is the probability of each of the following:
A. One out of the next four cars needs oil.
Probability =
B. Two out of the next eight cars needs oil.
C. 10 out of the next 40 cars needs oil.
You can earn partial credit on this problem.