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    Question

    The ratio of the expenditure to the savings of Richa is

    2 : 1. If her income and expenditure increase by 20% and 15%, respectively, then find the percentage increase in her savingsa
    A 35% Correct Answer Incorrect Answer
    B 30% Correct Answer Incorrect Answer
    C 20% Correct Answer Incorrect Answer
    D 25% Correct Answer Incorrect Answer

    Solution

    Let her initial expenditure and savings be 2k and k respectively. Her initial income = 2k + k = 3k Her final income = 3k× (1 + 20%) = 3.6k Her final expenditure = 2k x (1 + 15%) = 2.3k Her final savings = 3.6k- 2.3k = 1.3k Now, % change in savings = (k-1.3k/k) x 100% = 30%

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