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JEE Mains · Maths · STD 11 - 13. statistics

माना \(6\) प्रेक्षणों \(\mathrm{a}, \mathrm{b}, 68,44,48,60\) के माध्य तथा प्रसरण क्रमशः \(55\) तथा \(194\) हैं। यदि \(\mathrm{a}>\mathrm{b}\) है। तो \(\mathrm{a}+3 \mathrm{~b}\) = ...........

  1. A \(200\)
  2. B \(190\)
  3. C \(180\)
  4. D \(210\)
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Answer & Solution

Correct Answer

(C) \(180\)

Step-by-step Solution

Detailed explanation

\(\mathrm{a}, \mathrm{b}, 68,44,48,60\) Mean \(=55\) \(a>b\) Variance \(=194\) \(a+3 b\) \(\frac{a+b+68+44+48+60}{6}=55\) \(\Rightarrow 220+a+b=330\) \(\therefore a+b=110 \ldots . .(1)\) Also,…
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