The following bar graph indicates the demand and production (in hundreds) of 5 companies A, B, C, D and E. X-axis indicates the demand and production (in hundreds) and Y-axis indicates the companies. Study the bar graph carefully and answer the question that follows.

Find the difference between the average demand and average production of the five companies taken together.

Correct option is D

Given:
The bar graph shows the demand and production values (in hundreds) for five companies: A, B, C, D, and E.
The demand and production values for each company from the graph.

Formula Used: 

Average = $$\frac{\text{Total Sum}} {\text{Total Numbers}}$$

Solution:

Calculating the total demand and total production.
Total production = 30 + 40 + 25 + 40 + 45 = 180 (hundreds)
Total demand = 35 + 25 + 30 + 30 + 40 = 160 (hundreds)
Calculating the average production and average demand.

Average production = $$= \frac{180}{5} = 36$$​ (hundreds)

Average demand = $$= \frac{160}{ 5} = 32$$​ (hundreds)

Difference = Average demand - Average production = 36 - 32 = 4 (hundreds)
​$$4 \times 100 = 400$$​​
The difference between the average demand and average production is 400 units.

Thus, the correct option is (d) 400