Discussion

What is the average sale of all the branches for the year 2018?

Answer: B

Correct answer: 80,000

Read the 2018 series across all six branches and add.

\[80 + 75 + 95 + 85 + 75 + 70 = 480 \text{ thousand}\]

Divide by the six branches:

\[\frac{480}{6} = 80 \text{ thousand} = 80{,}000\]

Note the units: the chart is in thousands, so the average of 80 on the chart is 80,000 books.

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