Q. 294.6( 14 Votes )

<span lang="EN-US

Answer :

Let X be the number of kings drawn. Then X can be 0,1 or 2.

Sum of probabilities of all possible values of X is equal to 1.

Hence X is a random variable.

The mean of X is defined as, , where xi is the value of random variable and pi is the probability of that value of random variable.


The variance of X is defined by the formula , where and .


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

An urn contains 3Mathematics - Board Papers

Two cards are draMathematics - Board Papers

There are three cMathematics - Board Papers

Three numbers areMathematics - Board Papers

Let <span lang="EMathematics - Board Papers

Which of the follRD Sharma - Volume 2

Which of the follRD Sharma - Volume 2

A random variableRD Sharma - Volume 2