The average of any set of quantities can be found by adding all the numbers together then dividing by the number of quantities in the set.
i.e. average = total of quantities / number of quantities
e.g. A darts player throws the following scores during a match:
Her average score per throw = (80 + 100 + 62 + 180 + 21 + 55) ÷ 6 = 83Strictly speaking this type of average is called the mean. There are two other types of averages that you might come across: mode and median. We'll look at these shortly.