Study the line chart and table given below and answer the following questions

Line chart shows the number of chairs manufactured by 4 different chair manufacturers (A, B, C & D) in 2016 & 2017 and table shows the number of chairs sold by these manufacturers in 2016 & 2017.

Manufacturer	Chairs sold
	2016	2017
A	840	1440
B	900	1080
C	570	900
D	810	720

Find average number of chairs sold by A, B, C & D in 2016 is how much more or less than total unsold chairs of A, B, C & D together in 2017?

The correct option is 80.

Step 1: Understand the Data from the Line Chart and Table

From the provided line chart, we can extract the number of chairs manufactured by each manufacturer in 2016 and 2017:

• Manufacturer A:
- Manufactured in 2016 = 1200
- Manufactured in 2017 = 1600

• Manufacturer B:
- Manufactured in 2016 = 1500
- Manufactured in 2017 = 1200

• Manufacturer C:
- Manufactured in 2016 = 600
- Manufactured in 2017 = 1000

• Manufacturer D:
- Manufactured in 2016 = 900
- Manufactured in 2017 = 1200

From the provided table, the number of chairs sold by each manufacturer is given as follows:

• In 2016: A = 840, B = 900, C = 570, D = 810
• In 2017: A = 1440, B = 1080, C = 900, D = 720

Step 2: Calculate the Average Number of Chairs Sold by A, B, C & D in 2016

Total chairs sold in 2016:

$\text{Total Sold in 2016}=840+900+570+810=3120$

Average chairs sold in 2016:

$\text{Average Sold in 2016}=\frac{3120}{4}=780$

Step 3: Calculate the Total Unsold Chairs of A, B, C & D Together in 2017

The number of unsold chairs for each manufacturer in 2017 is calculated by subtracting the number of chairs sold from the number of chairs manufactured:

• Manufacturer A (2017): Unsold = 1600 - 1440 = 160
• Manufacturer B (2017): Unsold = 1200 - 1080 = 120
• Manufacturer C (2017): Unsold = 1000 - 900 = 100
• Manufacturer D (2017): Unsold = 1200 - 720 = 480

Total unsold chairs in 2017:

$\text{Total Unsold in 2017}=160+120+100+480=860$

Step 4: Find the Difference

Now, compare the average number of chairs sold in 2016 with the total unsold chairs in 2017:

$\text{Difference}=860-780=80$

Thus, the average number of chairs sold by A, B, C & D in 2016 is 80 less than the total unsold chairs of A, B, C & D together in 2017.