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    5. Find the average of the cubes of the first 7 natural numbers.

    Question

    Find the average of the cubes of the first 7 natural

    numbers.
    A 105 Correct Answer Incorrect Answer
    B 112 Correct Answer Incorrect Answer
    C 133 Correct Answer Incorrect Answer
    D 126 Correct Answer Incorrect Answer

    Solution

    According to this formula Average of cubes = n(n+1) ² /4 =7(7+1) ² /4 =7 ×64/4 =112

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    Relevant for Exams:

    • CSIR SO/ ASO

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