Find the average of natural numbers from 1 to 69. (both included)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 35.
Average of n natural numbers = (Sum of first n natural numbers)/n
Sum of first n natiral numbers = n(n + 1)/2
According to the given question,
n = 69
Sum of first 69 natural numbers = 69(69 + 1)/2
⇒ 69 × 35 = 2415
Average of first 69 natural numbers = 2415/69
⇒ 35
Hence the average of natural numbers from 1 to 69 (both included) is 35.