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    Question

    The average monthly income of A and B is ₹3,590. The

    average monthly income of B and C is ₹4,250. The average monthly income of A and C is ₹6,500. What is the monthly income of C? 
    A ₹7,545 Correct Answer Incorrect Answer
    B ₹6,984 Correct Answer Incorrect Answer
    C ₹8,190 Correct Answer Incorrect Answer
    D ₹7,160 Correct Answer Incorrect Answer

    Solution

    Given: A + B = 3590 × 2 = 7180 B + C = 4250 × 2 = 8500 A + C = 6500 × 2 = 13,000 Add all three equations: (A + B) + (B + C) + (A + C) = 7180 + 8500 + 13000 = 28,680 LHS becomes: 2A + 2B + 2C = 28,680 → A + B + C = 28,680 ÷ 2 = 14,340 Now subtract A + B: C = 14,340 − 7180 = ₹7,160

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