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    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.
    A 30000 Correct Answer Incorrect Answer
    B 26320 Correct Answer Incorrect Answer
    C 17530 Correct Answer Incorrect Answer
    D 23940 Correct Answer Incorrect Answer

    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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