Word Count : 253

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समांतर माध्य (Harmonic Mean) की गणना का सूत्र होता है: \[ HM = \frac{N}{\sum \frac{f}{x}} \] जहाँ: - \( N \) = कुल आवृत्तियों का योग (∑f) - \( x \) = वर्गों का मध्य बिंदु - \( f \) = वर्गों _____ _____ _____ _________ _____.
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