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Stastics — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsStastics1 Mark
MCQ
If $\sum\text{f}_\text{i}\text{s}_\text{i}=1860$ and $ \sum\text{f}_\text{i}=30$ then the value of $\bar{\text{x}}$ is :
  • A
    $26$
  • B
    $64$
  • ✓
    $62$
  • D
    $63$
✓

Answer

Correct option: C.
$62$
In the formula $\bar{\text{x}}=\text{a}+\frac{\sum\text{f}_\text{i}\text{d}_\text{i}}{\sum\text{f}_\text{i}},\text{d}_\text{i}$ represents.
$\bar{\text{x}}=\frac{\sum\text{f}_\text{i}\text{x}_\text{i}}{\sum\text{f}_\text{i}}=\frac{1860}{30}=62$
 

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