New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If A: B = 4: 5 and B: C = 3: 7, then what is the value of

    (3A + 8C)/(6B - 2C)?
    A 77/5 Correct Answer Incorrect Answer
    B 78/7 Correct Answer Incorrect Answer
    C 76/7 Correct Answer Incorrect Answer
    D 79/7 Correct Answer Incorrect Answer

    Solution

    A: B: C = 12: 15: 35
    Let A = 12k, B = 15k, and C = 35k
    So, (3A + 8C)/(6B - 2C) = (3 * 12k + 8 * 35k)/(6 * 15k - 2 * 35k) = 316/20 = 79/5

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