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Measures of Central Tendency — Economics STD 11 Commerce — Question

CBSE BoardEnglish MediumSTD 11 CommerceEconomicsMeasures of Central Tendency1 Mark
Question
Give the formula of calculating arithmetic mean in grouped frequency distribution (Short-cut method).
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Answer

Arithmetic mean $(\overline{\text{}X})=\text{A}+\frac{\sum\text{fdx}}{\sum\text{f}}$

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