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    Question

    In 2018, an online course had 'r' subscribers.

    Subscribers increased by 50% in 2019 and another 25% in 2020. However, in 2021 subscribers decreased by 40%. If the percentage of active users was 50% in 2018 and 60% in 2021, what is the percentage change in the number of active users?
    A 35% Correct Answer Incorrect Answer
    B 26% Correct Answer Incorrect Answer
    C 47% Correct Answer Incorrect Answer
    D 56% Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the number of subscribers in 2018 be 4000. In 2019, subscribers = 1.50├Ч4000=6000. In 2020, subscribers = 1.25├Ч6000=7500. In 2021, subscribers decreased by 40% = 0.60├Ч7500=4500. Active users in 2018 = 0.50├Ч4000=2000. Active users in 2021 = 0.60├Ч4500=2700. Percentage change in active users = {(2700тИТ2000)/2000}├Ч100% = 35%. Therefore, the number of active users increased by 35% from 2018 to 2021.

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