Final answer:
The probability that the student's average speed over a week is more than 65 mph is 60%.
Step-by-step explanation:
To find the probability that your average speed over the course of a week is more than 65 mph, we need to use the given information.
We know that 40% of runners ran at speeds of 7.5 miles per hour or less (slower), and 60% of runners ran at speeds of 7.5 miles per hour or more (faster).
Since we have no other specific information about your average speed, we can assume that it follows the same distribution as the runners.
Therefore, the probability that your average speed over the course of a week is more than 65 mph is 60%.