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 ratio of chairs manufactured by A & C together in 2016 to chairs sold by C & D together in 2017.

The correct answer is 10 : 9.

To find the required ratio, let us extract the necessary data points from the provided line chart and table:

Step 1: Find the total number of chairs manufactured by A & C together in 2016.

From the line chart (blue line with diamond markers for 2016):

• Chairs manufactured by A in 2016 = 1200
• Chairs manufactured by C in 2016 = 600

Total manufactured by A & C together in 2016 = $1200+600=1800$

Step 2: Find the total number of chairs sold by C & D together in 2017.

From the table under the "Chairs sold" column for 2017:

• Chairs sold by C in 2017 = 900
• Chairs sold by D in 2017 = 720

Total sold by C & D together in 2017 = $900+720=1620$

Step 3: Calculate the required ratio.

Ratio = (Chairs manufactured by A & C in 2016) : (Chairs sold by C & D in 2017)

$\text{Ratio}=1800:1620$

Dividing both terms by 180:

$\text{Ratio}=\frac{1800}{180}:\frac{1620}{180}=10:9$