यदि एक वितरण का प्रसरण 81 है और गुणांक भिन्नता 30% है, माध्य ज्ञात कीजिए।

  1. 25
  2. 30
  3. 35
  4. 40

Answer (Detailed Solution Below)

Option 2 : 30
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हम जानते हैं कि,

और,

गुणांक भिन्नता  

⇒ माध्य = 30

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