If _iu_i=-7, _i=225 and h =50 then the value of x is : - Vidyadip

MCQ

If $\sum\text{f}_\text{i}\text{u}_\text{i}=-7,\sum\text{f}_\text{i}=225$ and $\text{h} =50$ then the value of $\bar{\text{x}}$ is :

A
$212$
B
$213$
C
$214$
✓
$211$

✓

Answer

Correct option: D.

$211$

$\bar{\text{x}}=\text{a}+\frac{\sum\text{f}_\text{i}\text{u}_\text{i}}{\sum\text{f}_\text{i}}$
$=225+\frac{-7}{25}\times50$
$=225-14$
$=211$

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