Average speed is especially useful because it takes into account the reality of an event rather than assuming something or someone is moving at a constant speed. Given a list of numbers it is easy to determine the arithmetic mean or average. When we do a simple mean or average we give equal weight to each number.
8 times 4 is 32.
A mean where some values contribute more than others. 8 times 4 is 32. So depending on what school you go to thats either a B or a C. Given a list of numbers it is easy to determine the arithmetic mean or average.