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      Question

      What is the standard deviation of first n natural

      numbers?
      A Sq rt [(N^2 -1)/12] Correct Answer Incorrect Answer
      B Sq rt [(N-1)/12] Correct Answer Incorrect Answer
      C Sq rt [(N+1)/12] Correct Answer Incorrect Answer
      D Sq rt [N^2 /12] Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

       

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