What is the Arithmetic Mean of First 20 Odd Natural Numbers?

  1. 17
  2. 19
  3. 20
  4. 22
Monis Rasool Professor Asked on 29th August 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3) 20

    Explanation:-
    Formula –
    The sum of first n odd numbers = n2
    Then, the sum of 20 odd numbers = (20)2
    = 20 x 20
    = 400

    Then, the average of first 20 odd numbers = 400/20
    = 20

    Hence, the answer is (3) 20.

    Anurag Mishra Professor Answered on 31st August 2015.
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