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    Question

    A = (5/2) × B and C = (1/10) × A. If (A + B + C) =

    255, then determine the value of (7C – B).
    A 42 Correct Answer Incorrect Answer
    B 18 Correct Answer Incorrect Answer
    C 51 Correct Answer Incorrect Answer
    D 25 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ; A = 10C And, A = (5/2) × B So, 10C = (5/2) × B Or, 4C = B Since, A + B + C = 255 So, 10C + 4C + C = 255 Or, 15C = 255 Or, C = 17 A = 17 × 10 = 170 And, B = 4 × 17 = 68 Required value = 7 × 17 – 68 = 51

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