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Weighted Mean
1) Automobile Selling Prices: Find the weighted mean price of three models of automobiles sold. The number and price of each model sold are shown in this list.
| Model |
Number |
Price |
| A |
8 |
$10,000 |
| B |
10 |
$12,000 |
| C |
12 |
$8,000 |
2) Diet Cola Preference: A recent survey of a new diet cola reported the following percentages of people who liked the taste. Find the weighted mean of the percentages.
| Area |
% Flavored |
Number Surveyed |
| 1 |
40 |
1000 |
| 2 |
30 |
3000 |
| 3 |
50 |
800 |
3) Costs of Helicopters: The costs of three models of helicopters are shown here. Find the weighted mean of the costs of the models.
| Model |
Number sold |
Cost |
| Sunscraper |
9 |
$427,000 |
| Skycoaster |
6 |
$365,000 |
| High-flyer |
12 |
$725,000 |