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    Question

    A woman uses 25% of her salary for house rent, then spends

    20% of the remaining amount on grocery, and 30% of the rest on transportation. She manages to save the remaining amount. If she spent Rs. 270 on transportation, what is the amount she saved?
    A Rs.720 Correct Answer Incorrect Answer
    B Rs.630 Correct Answer Incorrect Answer
    C Rs.550 Correct Answer Incorrect Answer
    D Rs.660 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the salary be Rs. ‘x’.

    House rent = 0.25 × x = Rs. 0.25x

    Remaining salary = x – 0.25x = Rs. 0.75x

    Grocery expense = 0.2 × 0.75x = Rs. 0.15x

    Remaining salary = 0.75x – 0.15x = Rs. 0.6x

    Transportation = 0.3 × 0.6x = Rs. 0.18x

    ATQ:

    0.18x = 270

    ⇒ x = 1500

    Amount saved = x – (0.25x + 0.15x + 0.18x) = 0.42x

    ⇒ 0.42 × 1500 = Rs. 630

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