Sales records at an automobile dealership show that they sold 40 red cars one month. of those cars, 25 were new cars and 15 were used cars. james bought a red car from the dealership that month. what is the probability he bought a used car? express your answer as a fraction in lowest terms.

You find the probability of an event happening if you divide the number of times that event has actually happened in the experiment by the number of total events that has happened. If you want to find the probability of the used car, you have to know..

how many used cars were there? 15
how many cars were there? 40

Therefore, the probability of buying a used car is 15/40 or 3/8.