Answer:
Carlton would have actually run 1025 miles and not 900 in 41 weeks.
Explanation:
Total miles run by Carlton in one week includes 3 miles per day for five days ( Monday to Friday) and 5 miles per day for two days(Saturday and Sunday).
So the total miles in a week = 3 * 5 + 5 * 2 = 15 + 10 = 25
In 41 weeks, he would have run 41* 25 miles = 1025 miles
But as per Carlton's calculation, he would have run only 900 miles.
So we can conclude that Carlon's calculation is less than the actual number of miles run by 125.