Question : The number of different colleges in India in different years is given in the graph. The percent distribution of different colleges in years 1980 and 1990 are shown in the pie chart.
By what % are the medical colleges in 1980 is less than that in 1990?
Option 1: 25%
Option 2: 30%
Option 3: 32%
Option 4: 20%
Correct Answer: 25%
Solution :
Number of colleges in 1980 = 20,000
Percentage of medical colleges in 1980 = 12%
Number of medical colleges in 1980 = $\frac{12}{100}\times 20000$ = 2400
Number of colleges in 1990 = 40,000
Percentage of medical colleges in 1990 = 8%
Number of medical colleges in 1990 = $\frac{8}{100}\times 40000$ = 3200
So, the required percentage = $\frac{3200-2400}{2400}\times 100$ = 25%
Hence, the correct answer is 25%.
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