# Ex 13.4, 2 - Chapter 13 Class 12 Probability

Last updated at Dec. 8, 2016 by Teachoo

Last updated at Dec. 8, 2016 by Teachoo

Transcript

Ex 13.4, 2 An urn contains 5 red and 2 black balls. Two balls are randomly drawn. Let X represent the number of black balls. What are the possible values of X? Is X a random variable ? When two balls are drawn from the urn, possible outcomes are : Sample Space S = {RR, BB, BR, RB} Let X : number of black balls Hence values of X can be 0, 1, 2 Hence X = {0, 1, 2} Thus, X is a real valued function whose domain is sample space Hence, X is a random variable

Ex 13.4

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Ex 13.4, 2 You are here

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Ex 13.4, 10 Deleted for CBSE Board 2021 Exams only

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Ex 13.4, 12 Important Deleted for CBSE Board 2021 Exams only

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Ex 13.4, 17 Important Deleted for CBSE Board 2021 Exams only

Chapter 13 Class 12 Probability

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.