Q:

# How do you calculate your average monthly water bill?

A:

Calculate your average monthly water bill by adding all the bills for a predetermined number of months and then dividing the total by the number of months. You must add at least two months to determine an average.

## Keep Learning

A water bill is generated monthly by a municipal water department and provides the customer the quantity of water used the previous month and the amount of money owed to the water department for that water. Water bills increase as more water is used and decrease as less water is used. Averaging water bills gives the consumer a better idea of water use and its associated cost than can be determined by viewing individual monthly bills. For example, a \$200 bill one month and \$20 bill the next yields an average of \$110 per month. While the bills taken individually provide a distorted view, the average allows the consumer to plan and budget more accurately.

An average, also known as the arithmetic mean, is the sum of a group of numbers divided by the number of numbers in the group. Averages have many uses and are frequently used to determine final grades for students, game statistics for athletes and monthly expenditures for businesses and individuals.

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