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A line chart shows the number of chairs manufactured by four different chair manufacturers A, B, C, and D in 2016 and 2017, and a table shows the number of chairs sold by these manufacturers in 2016 and 2017. Chairs sold: Manufacturer | 2016 | 2017 A | 840 | 1440 B | 900 | 1080 C | 570 | 900 D | 810 | 720 Note: Total chairs manufactured by any manufacturer in any year = total chairs sold + unsold chairs of that manufacturer in that year. Question: Find the average number of chairs sold by A, B, C, and D in 2016, and compare it with the total unsold chairs of A, B, C, and D together in 2017.

1. 80
2. 160
3. 350
4. 190

Correct answer: 80

Solution

The average sold in 2016 is based on the four given sales values. Using the line chart values for 2017 manufacturing, subtract total sold in 2017 to get total unsold chairs, and then compare the two quantities. The resulting difference is 80.

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