Question

The mean of the first four natural numbers rounded off to its nearest whole number is

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is C 3

The first four natural numbers are:
1, 2, 3, and 4.

$Mean=$ $\frac{Sumoftheobservations}{Numberoftheobservations}$

Number of observations = 4.

Inserting the values, we get:

$Mean=$ $\frac{1+2+3+4}{4}$
$=$ $\frac{10}{4}$

Converting into decimal, you get

$\frac{10}{4}$ $=$ $\frac{10÷2}{4÷2}$ $=$ $\frac{5}{2}$$=$ $\frac{5\times 5}{2\times 5}$ $=$ $\frac{25}{10}$

$=2.5$

Rounding off the mean to the nearest whole number, 2.5 becomes 3.

∴ Mean of the first 4 natural numbers rounded to the nearest whole number is 3