Question
The population of a town rose by 7% and then 9% in the
next year, followed by a drop of 15% in the third year. If the population in 2023 stood at 27,214.05, find the population in 2020.Solution
ATQ,
Let the population in 2020 be ‘x’.
ATQ,
x × 1.07 × 1.09 × 0.85 = 27214.05
Or, x = 27214.05 × (1/1.07) × (1/1.09) × (1/0.85)
So, x = 30,000
Therefore, the population of the town in 2020 = x = 30,000
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