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15 votes
15 votes
How do you do the average cost of 3 chairs. Their costs are $70, $90 and $100

User Beanie
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1 Answer

19 votes
19 votes

The formula for calculating average is expressed as

average = sum of items/number of items

In this scenario, number of items = 3

sum of the costs = 70 + 90 + 100 = 260

Average cost = 260/3

average cost = $86.7

User Tiffanie
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