2.5 से मापे गए अवलोकनों की n संख्या के विचलनों का योग 50 है। 3.5 से मापे गए अवलोकनों के समान सेट के विचलनों का योग -50 है। n का मान क्या है?

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NDA (Held On: 6 Sep 2020) Maths Previous Year paper
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  1. 50
  2. 60
  3. 80
  4. 100

Answer (Detailed Solution Below)

Option 4 : 100
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NDA 01/2025: English Subject Test
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Detailed Solution

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संकल्पना:

विचलन = |डेटा मान - माध्य|

 

गणना:

मान लें, डेटा मान  है

 and 

Now,

अब -50 + 3.5n = 50 + 2.5n

⇒n = 100

⇒ n = 100

इसलिए, विकल्प (4) सही है।

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