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    Question

    Four roommates ('L', 'M', 'N', 'O') received a bill of

    Rs. 2,500 for their electricity usage. 'L' paid 1/5th of what the other three paid jointly. 'M' contributed Rs. 50 less than what 'L' paid. 'N' and 'O' paid the same amount, each Rs. 20 more than 'L'. Determine how much 'M' paid.
    A Rs.500 Correct Answer Incorrect Answer
    B Rs.450 Correct Answer Incorrect Answer
    C Rs.350 Correct Answer Incorrect Answer
    D Rs.540 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the amount paid by 'L' be Rs. 'p'.

    So, the amount paid by 'M', 'N', and 'O' together = 4p.

    Thus, we have:

    p + 4p = 2500.

    5p = 2500.

    p = 500.

    Now, amount paid by 'M' = 500 - 50 = Rs. 450.

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