ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!
  • google app store apple app store
    • тЬЦ

      Question

      What is the average of the squares of the first 19 natural

      numbers?
      A 122 Correct Answer Incorrect Answer
      B 126 Correct Answer Incorrect Answer
      C 130 Correct Answer Incorrect Answer
      D 134 Correct Answer Incorrect Answer

      Solution

      Sum of squares of first 'n' natural numbers = n ├Ч (n + 1) ├Ч (2n + 1) ├╖ 6
      So, average = n ├Ч (n + 1) ├Ч (2n + 1) ├╖ 6n = (n + 1) ├Ч (2n + 1) ├╖ 6
      = (19 + 1) ├Ч (2 ├Ч 19 + 1) ├╖ 6
      = 20 ├Ч 39 ├╖ 6
      = 130

      Practice Next
      More Average Questions

      Relevant for Exams:

      ask-question