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    Question

    Priya spends 80% of her monthly

    income. If her monthly income increases by 25% and her monthly expenditure also increases by 15%, find the percentage increase in her savings.
    A 55% Correct Answer Incorrect Answer
    B 28% Correct Answer Incorrect Answer
    C 65% Correct Answer Incorrect Answer
    D 20% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the initial monthly income be тАШRs. xтАЩ. Initial monthly expenditure = тАШRs. 0.8xтАЩ So, initial savings = тАШRs. 0.2xтАЩ Increased monthly income = 1.25 ├Ч x = тАШRs. 1.25xтАЩ Increased monthly expenditure = 1.15 ├Ч 0.8x = тАШRs. 0.92xтАЩ So, increased savings = (1.25x тАУ 0.92x) = тАШRs. 0.33xтАЩ Required percentage = {(0.33x тАУ 0.2x)/0.2x} ├Ч 100 = {(0.13x ├Ч 100)/0.2x} = 65%

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