Averages Continued

To find the average, we divide the total income by the number of households.

252,000 divided by 5 = 50,400

The average household income would be $50,400.

Be sure that you have added all the numbers you need. The average will always be larger than the smallest number you have added and smaller than the largest number.

Practice

1. The Johnstons spent $213 on groceries last month, the Jardines spent $300, the Smiths spent $242, the Youngs spent $260 and the Edwards spent $335. What was the average grocery bill last month?

2. Joe, Bill, Wayne, Blair and Russell all work at the Stora/ENSO pulp and paper mill, but they live in different places. Each week Joe drives 250 kilometres to and from work. Bill drives 100, Wayne drives 175, Blair drives 200 and Russell drives 50 kilometres. What is the average distance they drive to and from work each week?

3. The staff of the payroll office at the pulp and paper mill bowl together each week. Joanne had some good weeks and some bad weeks last month. Her scores were 97, 68, 102 and 85. What was her average score last month?

4. Glenda, Kathy, Erin, Jane, Allan and Jeff went out together for Chinese food. The bills came to $15, $13, $16, $14, $20 and $18. What was the average bill?