The average of first 13 whole numbers is:

Correct option is A

Given:
The first 13 whole numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12.
Formula Used:
​$$\text{Average} = \frac{\text{Sum of all observations}}{\text{Number of observations}}$$​​
Solution:
The number of observations is 13.
Sum = 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 = 78
Average = $$\frac{78}{13}$$​ = 6