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    Question

    Group ‘M’ comprises four even integers in order, and

    group ‘N’ includes four successive odd integers. If the average of their first elements is 33.5, what is the sum of the last elements of both groups?
    A 42 Correct Answer Incorrect Answer
    B 79 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,

    Group M: {x, (x + 2), (x + 4), (x + 6)} Group N: {y, (y + 2), (y + 4), (y + 6)} Now, (x + y) ÷ 2 = 33.5 Or, x + y = 67 Required sum = x + 6 + y + 6 = 67 + 12 = 79

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