Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Provide solution for RD Sharma maths class 12 chapter 31 Mean and Variance of a Random Variable exercise 31.1 question 2 maths textbook solution

Provide solution for RD Sharma maths class 12 chapter 31 Mean and Variance of a Random Variable exercise 31.1 question 2 maths textbook solution

Answers (1)

Answer: So the required value of K=0.1

Hint: we will use the formula \sum P\left ( x=n \right )=1

Given:

X -2 -1 0 1 2 3
P\left ( X \right ) 0.1 K 0.2 2K 0.3 K

Solution:

P(-2)+P(-1)+P(0)+P(1)+P(2)+P(3)=1

\Rightarrow 0.1+K+0.2+2 K+0.3+K=1

\Rightarrow 4 K+0.6=1

\Rightarrow 4 K=1-0.6

\Rightarrow 4 K=0.4

\Rightarrow K=\frac{0.4}{4}

\Rightarrow K=\frac{1}{10}

\Rightarrow K=0.1

Posted by

Infoexpert

View full answer

Similar Questions

Latest Question