Question

If mean of $3$, $4$, $x$, $7$, $10$ is $6$, then the value of $x$ is

• A. $4$
• B. $5$
• C. $6$
• D. $7$

Answer 1

Answer: (C)

Mean $=\frac{\text{Sum of observations}}{\text{Number of observations}}$

$\Rightarrow 6=\frac{3+4+x+7+10}{5}$

$\Rightarrow x=30-24=6$