Averages

An average is found by dividing a total by the number of items: \(\text{average} = \frac{\text{total}}{\text{count}}\). You can also work backward: \(\text{total} = \text{average} \times \text{count}\). To find an average over several groups, find each group's total, add them together, and divide by the total number of items. Do not simply average the averages unless every group has the same size.