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JEE Mains · Maths · STD 11 - 13. statistics

सात प्रेक्षणों के माध्य तथा प्रसरण क्रमशः \(8\) तथा \(16\) है। यदि इनमें से \(5\) प्रेक्षण \(2,4,10,12,14\) है, तो शेष दो प्रेक्षणों का गुणनफल है 

  1. A \(40\)
  2. B \(45\)
  3. C \(49\)
  4. D \(48\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(48\)

Step-by-step Solution

Detailed explanation

Let \(7\) observation be \({x_1},{x_2},{x_3},{x_4},{x_5},{x_6},{x_7}\) \(\bar x = 8 \Rightarrow \sum\limits_{i = 1}^7 {{x_i}} = 56\,\,\,\,\,\,.......\left( 1 \right)\) Also \({\sigma ^2} = 16\)…
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