Question : The population of the city was 12,50,000 in the year 2010. It increased at the rate of 2% per annum during the years 2011 and 2012. In the year 2013, it decreased by 1%. Find the population of the city at the end of 2013.
Option 1: 1,28,54,952
Option 2: 13,50,000
Option 3: 13,87,495
Option 4: 12,87,495
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Correct Answer: 12,87,495
Solution :
The population of the city in 2010 is 1250000.
Then, Population,
Rate of increment,
We have to find the population at the end of the year 2012, i.e. time,
Population after 2 years is given by
New Population
Again it decreased by 1%
New Population
Hence, the correct answer is 12,87,495.
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