In the following bar diagram the number of engineers employed in various companies has been given. Study the bar diagram carefully to answer the questions.
What is the difference between the average number of junior engineers and assistant engineers taking all the companies together ?
In all the companies taken together, number of :
Assistant engineers = 150 + 350 + 200 + 250 + 150 = 1100
Junior engineers = 100 + 100 + 150 + 250 + 250 = 850
=> Required difference = $$\frac{1100 - 850}{5} = 50$$
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