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अव्यवस्थित प्राप्तांकों से मध्यमान ज्ञात करने का सूत्र लिखिए।

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सूत्र : 
\({ M= }\frac { \Sigma X }{ N } \)
यहाँ M = मध्यमान, ∑ = प्राप्तांकों का योग, N = प्राप्तांकों की संख्या।

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