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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.
If the number of assistant engineers employed in all the companies be increased by37% and the number of post graduate engineers employed in all the companies be decreased by 20%, by what per cent will the number of assistant engineers be less than that of post graduate engineers ?
In all companies :
Assistant engineers = 150 + 300 + 200 + 150 + 100 = 900
After 37% increase = $$\frac{137}{100}$$ * 900 = 1233
Post graduate engineers = 100 + 250 + 400 + 550 + 400 = 1700
After 20% decrease = $$\frac{80}{100}$$ * 1700 = 1360
$$\therefore$$ Required % = $$\frac{1360 - 1233}{1360}$$ * 100 = 9.3%
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