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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1 Answer(s)

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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