Question

The average of 5 observations $x+3,x+5,x+7,x+9,x+11$ is 14. Find the value of x.

• A. 5
• B. 6
• C. 7
• D. 8

Answer 1

The correct option is

C

7

Average = $\frac{x+3+x+5+x+7+x+9+x+11}{5}=14$

$\Rightarrow$ $5x+35=70$

$\Rightarrow$ $5x=35$

$\Rightarrow$ $x=7$

Hence, the value of x is 7.