Question

The mean of 5 observations 3, 5, 7, x and 11 is 7, find the value of x.

Answer 1

$\huge{\mathcal{Hey \ Mate \ !!}}$

$\huge{\texttt{Answer \ :-}}$
$<b>$
Mean = $\dfrac{Sum \ of \ all \ observation}{Total\ no. \ of \ observation}$

7 = $\dfrac{3 + 5 + 7 + x + 11}{5}$

7 × 5 = 26 + x

35 - 26 = x

9 = x

So, the value of x is $\boxed{9}$

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