The arithmetic mean (average) of the first 10 whole number is

A. 5

B. 4

C. 5.5

D. 4.5

Answer: Option D

Solution(By Examveda Team)

According to the question,
First 10 whole numbers are = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
∴ Average of 10 whole numbers
$$\eqalign{ & = \frac{{0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9}}{{10}} \cr & = \frac{{45}}{{10}} \cr & = 4.5 \cr} $$