Your work at a company that sells 'Green' cars. You are interested in what proportion of your cars have mpg of 100 or more. In a sample of 25 green cars, 7 of them have mpg of 100 or more. The facts of this problem are:
a. X = 25; n = 100
b. X = 7; n = 25
c. X = 100;n = 7
d. X = 25; n = 7