The mean of the data when _id_i=435, _i=30 and a=47.5 is : - Vidyadip

MCQ

The mean of the data when $\sum\text{f}_\text{i}\text{d}_\text{i}=435,\sum\text{f}_\text{i}=30$ and $\text{a}=47.5$ is :

A
$63$
B
$30$
✓
$62$
D
$47.5$

✓

Answer

Correct option: C.

$62$

Mean$=\bar{\text{x}}=\text{a}+\frac{\sum\text{f}_\text{i}\text{d}_\text{i}}{\sum\text{f}_\text{i}}$
$=47.5+\frac{435}{30}$
$= 47.5+14.5=62$

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