What is the average of first 31 odd numbers?

Correct option is C

Given:
The first 31 odd numbers are: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61.
Formula Used:
The average of first n odd numbers = (First term + Last term) / 2.
Solution:
The average of the first 31 odd numbers = (1 + 61) / 2 = 31.0.

Alternate Method:

Formula used:

Average of n odd numbers = n

Calculation:

Average of 31 odd numbers = 31