By the direct method, the mean of grouped data is

A. \(\bar{X} = \frac{\sum f_i x_i}{\sum f_i}\)

B. \(\bar{X} = \frac{\sum x_i}{\sum f_i}\)

C. \(\bar{X} = \frac{\sum f_i}{\sum f_i x_i}\)

D. \(\bar{X} = \sum f_i x_i\)

Doubtly AI Asked 24 Oct 2026 AI-verified · Oct 2026 ssc 10th Save WhatsApp Report

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Answer: A. \(\bar{X} = \frac{\sum f_i x_i}{\sum f_i}\)

Mean \(= \frac{\sum f_i x_i}{\sum f_i}\), where \(x_i\) are class marks.

Doubtly AI · 24 Oct 2026 AI-verified · Oct 2026 Report

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