The slowest horse

Consider this scenario: Mr. Brown and Mr. Green have argued several times about which one of them has the slowest horse. They have swapped stories, each telling of the races his horse has lost, but each man also has failed to convince the other that his horse was the slowest.
Please respond to the following:
Create the best solution for solving the problem of who owns the slowest horse.
Explain your reasons for why you believe your solution would solve the two men’s problem.

Every race has finish times for each horse. If they total the finish times for all of the races in which both horses have competed, the horse with the greater number will be the slowest horse. That would solve their problem because the slower horse will take more time to cover the same distance.