x ~ B (n = 10, p), E(x) = 8 అయితే, P విలువను కనుగొనండి.

  1. 0.5
  2. 0.6
  3. 0.8
  4. 0.4

Answer (Detailed Solution Below)

Option 3 : 0.8
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NDA 01/2025: English Subject Test
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Detailed Solution

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భావన:

ఆశించిన సగటు:

E(x) = np  

 

గణనలు:

x ~ B ( n = 10, p) అని ఇవ్వబడింది

E(x) = 8 

E(x) = np అని మనకు తెలుసు

⇒ np = 8 

⇒(10)p = 8

⇒ p = \(\rm\dfrac {8}{10}\)

⇒ p = 0.8

x ~ B ( n = 10, p) , E(x) = 8 అయితే,అప్పుడు P విలువ 0.8

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