Let's say there are 10 cars on the road today in America.
Here are their respective ages:
1, 2, 3, 4, 6, 9, 11, 16, 34, 70.
Average age: 15.6 years
Median age: 10 years.
The average age of cars in the U.S. isn't very useful when trying to determine how many cars on the road would be...