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    Question

    Sana uses x% of her earnings on house rent, then spends

    20% of the remaining on groceries, pays Rs. 9400 as miscellaneous bills, and saves Rs. 7240 from a total of Rs. 32000. Find x.
    A 24 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 42 Correct Answer Incorrect Answer
    D 35 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, 32000 Γ— {(100 βˆ’ x)/100} Γ— (80/100) βˆ’ 9400 = 7240 = 32000 Γ— 80/10000 Γ— (100 βˆ’ x) βˆ’ 9400 = 7240 = 256 Γ— (100 βˆ’ x) βˆ’ 9400 = 7240 25600 βˆ’ 256x βˆ’ 9400 = 7240 16200 βˆ’ 256x = 7240 256x = 16200 βˆ’ 7240 = 8960 x = 8960/256 = 35

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