Question

Let $x,y,z$ be three observations. The mean of these observations is:

• A. $\frac{\left(x\times y\times z\right)}{3}$
• B. $\frac{\left(x+y+z\right)}{3}$
• C. $\frac{\left(x-y-z\right)}{3}$
• D. $\frac{\left(x\times y+z\right)}{3}$

Answer 1

The correct option is B

$\frac{\left(x+y+z\right)}{3}$

Explanation for the correct option:

Compute the mean of the given observations:

According to the formula of mean:

$\mathbf{\text{Mean=}}\frac{\mathbf{\text{Sum of all the observations}}}{\mathbf{\text{Number of observations}}}$.

So, if $x,y,z$ are the three observations.

Then the mean is given by: $\frac{\left(x+y+z\right)}{3}$.

Hence, option (B) is the correct answer.