Word Count : 279

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आयत-चित्र (Histogram) और आवृत्ति बहुभुज (Frequency Polygon) बनाने के लिए निम्नलिखित चरणों का पालन करें: ### चरण 1: वर्गों के मध्य बिंदु (Midpoints) ज्ञात करें मध्य बिंदु = \(\frac{\text{निचली सीमा} + \text{ऊपरी सीमा}}{2}\) | वर्ग | आवृत्ति (f) | मध्य बिंदु (x) | |-----------|------------|---------------| | 10 - 20 | 10 | \( \frac{10+20}{2} = 15 ______ _____ ________ ________ ___ __________.
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