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

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Solution

The correct option is B
7

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

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

$\Rightarrow$ $5 x = 35$

$\Rightarrow$ $x = 7$

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