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Question Number 122436 by sahiljakhar04 last updated on 17/Nov/20

$$\mathbf{Mean}:\mathrm{It}\mathrm{is}\mathrm{found}\mathrm{by}\mathrm{adding}\mathrm{all}\mathrm{the}\mathrm{values}\mathrm{of}\mathrm{the}\mathrm{observation}\mathrm{and}\mathrm{dividing}\mathrm{it}\mathrm{by}\mathrm{the}$$$$\mathrm{total}\mathrm{number}\mathrm{of}\mathrm{observations}.\mathrm{It}\mathrm{is}\mathrm{denoted}\mathrm{by}\overline{x}.$$$$\mathrm{So},\overline{x}=\frac{\underset{i=1}{\sum ^n}{x}_i}{n}.\mathrm{For}\mathrm{an}\mathbf{ungrouped}\mathbf{frequency}\mathbf{distribution},\mathrm{it}\mathrm{is}\overline{\mathit{x}}=\frac{\underset{\mathit{i}=1}{\sum ^{\mathit{n}}}{\mathit{f}}_{\mathit{i}}{\mathit{x}}_{\mathit{i}}}{\underset{\mathit{i}=1}{\sum ^{\mathit{n}}}{\mathit{f}}_{\mathit{i}}}.$$

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