Question : The number of different colleges in India in different years is given in the graph. The percent distribution of different colleges in the years 1980 and 1990 is shown in the pie chart.
What is the difference in the number of engineering colleges in the 80's and 90 's?
Option 1: 13,000
Option 2: 10,000
Option 3: 15,000
Option 4: none
Correct Answer: 13,000
Solution :
Number of colleges in 80's = 20,000
Percentage of engineering colleges in 80's = 15%
Number of engineering colleges in 80's = $\frac{15}{100}\times 20000$ = 3,000
Number of colleges in 90's = 40,000
Percentage of engineering colleges in 90's = 40%
Number of engineering colleges in 90's = $\frac{40}{100}\times 40000$ = 16,000
So, the difference in the number of engineering colleges in 80's and 90 's= 16,000 – 3,000 = 13,000
Hence, the correct answer is 13,000.
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