The population of a small community grows by 10% in the first year and decreases by 10% in the second year. If the population at the end of 2 years is 39600, find the original population. MCQ with Answer and Explanation
The population of a small community grows by 10% in the first year and decreases by 10% in the second year. If the population at the end of 2 years is 39600, find the original population.
A. Rs. 40000
B. Rs. 42000
C. Rs. 38000
D. Rs. 44000
Answer: Option A
Solution (By JKSSB Mock Tests)
Net change over 2 years = +10 - 10 - (1010)/100 = -1% (decrease). So, 99% of original population = 39600 => Original population = 39600 / 0.99 = 40000.
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