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    Question

    A set β€˜X’ includes four back-to-back even numbers,

    and set β€˜Y’ holds four successive odd numbers. The mean of the second elements from both sets is 38.5. Determine the total of the last numbers in both sets.
    A 42 Correct Answer Incorrect Answer
    B 75 Correct Answer Incorrect Answer
    C 85 Correct Answer Incorrect Answer
    D 51 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Set X: {a, (a + 2), (a + 4), (a + 6)} Set Y: {b, (b + 2), (b + 4), (b + 6)} Now, (a + 2 + b + 2) Γ· 2 = 38.5 Or, a + b + 4 = 77 Or, a + b = 73 Required sum = a + 6 + b + 6 = 73 + 12 = 85

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