A sign on the pumps at a gas station encourages customers to have their oil checked, and claims that one out of 3 cars needs to have oil added (hence, this is the probability of "success"). 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.
Probability =

C. 10 out of the next 40 cars needs oil.
Probability =