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JEE Mains · Maths · STD 11 - 13. statistics

माना \(\mathrm{a}, \mathrm{b}, \mathrm{c} \in \mathrm{N}\) और \(\mathrm{a}<\mathrm{b}<\mathrm{c}\) हैं। माना \(5\) प्रेक्षणों \(9\),\(25\), \(a\), \(b\), \(c\) का माध्य, माध्य के सापेक्ष माध्य विचलन और प्रसरण क्रमशः \(18\),\(4\) और \(\frac{136}{5}\) हैं। तो \(2 \mathrm{a}+\mathrm{b}-\mathrm{c}\) = ...........

  1. A \(39\)
  2. B \(18\)
  3. C \(35\)
  4. D \(33\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(33\)

Step-by-step Solution

Detailed explanation

\( a, b, c \in N \quad a < b < c \) \( \bar{x}=\text { mean }=\frac{9+25+a+b+c}{5}=18 \) \( a+b+c=56 \) \( \text { Mean deviation }=\frac{\sum\left|x_i-\bar{x}\right|}{n}=4 \) \( =9+7+|18-a|+|18-b|+|18-c|=20 \) \( =|18-a|+|18-b|+|18-c|=4 \)…
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