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Formula to find mean for a grouped data is 

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Formula to find mean for a grouped data is 

A) A + \(\frac{∑\hat f_id_i}{\sum f_i}\)

B) A + \(\frac{∑\hat f_id_i}{C}\)

C) A + \(\frac{∑\hat f_id_i}{∑f_i}\) × C 

D) None

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Correct option is (A) \(A + \frac{\sum f_i \, d_i}{\sum f_i}\)

\(A + \frac{\sum f_i \, d_i}{\sum f_i}\) is a formula to find the mean for a grouped data.

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 A) A + \(\frac{∑\hat f_id_i}{\sum f_i}\)

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