ExamBro
ExamBro
enEnglishhiहिन्दीguગુજરાતી
JEE Mains · Maths · STD 11 - 13. statistics

માહિતી \(4, 5,6,6,7,8, x\), \(y,\)\(x < y\) નાં મધ્યક અને  વિચરણ અનુક્રમે  \(6\) , અને \(\frac{9}{4}\) છે.તો,  \(x^{4}+y^{2}=\dots\dots\dots\dots\) 

  1. A \(162\)
  2. B \(320\)
  3. C \(674\)
  4. D \(420\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(320\)

Step-by-step Solution

Detailed explanation

mean \(\bar{x}=\frac{4+5+6+6+7+8+x+y}{8}=6\) \(\Rightarrow x+y=48-36=12\) Variance \(=\frac{1}{8}\left(16+25+36+36+49+64+x^{2}+y^{2}\right)-36=\frac{9}{4}\) \(\Rightarrow x^{2}+y^{2}=80\) \(\therefore x=4 ; y=8\) \(x^{4}+y^{2}=256+64=320\)
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app