An automobile that you are looking at purchasing has an advertised fuel mileage of 30 miles per gallon. You rent the car for a week and track your mileage to school and back home and get (miles/gallon):
26 mpg 25 mpg
24 mpg 28 mpg
20 mpg 30 mpg
25 mpg 26 mpg
27 mpg 33 mpg
What is the probability that if you purchase the car you will get the fuel mileage advertised or better (in %)?