The Average of First 15 Positive Whole Numbers is

  1. 9.5
  2. 7.5
  3. 8.0
  4. 7.0
Monis Rasool Professor Asked on 21st June 2015 in Reasoning Questions.
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    Answer: (3) 8.0
    Explanation:-
    Formula-
    Sum of first n positive number = n(n+ 1)/2
    Where, n is the number of the natural number.
    Then, Sum of first 15 positive number = 15(15 + 1) /2
    = 15 x 8 = 120
    Now, the average of first 15 whole number = 120/15 = 8
    Hence, the answer is (3) 8.0

    Anurag Mishra Professor Answered on 22nd June 2015.
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