Ex 13.4, 11 - Two dice are thrown. If X is number of sixes

Ex 13.4, 11 - Chapter 13 Class 12 Probability - Part 2
Ex 13.4, 11 - Chapter 13 Class 12 Probability - Part 3

  1. Chapter 13 Class 12 Probability (Term 2)
  2. Serial order wise

Transcript

Ex 13.4, 11 Two dice are thrown simultaneously. If X denotes the number of sixes, find the expectation of X.Let X be the number of sixes occur So, value of X can be 0, 1 or 2 Total number of possible outcomes = 36 So, our probability distribution is The Expectation of X is given by E(X) = ๐œ‡=โˆ‘_(๐‘–=1)^๐‘›โ–’๐‘ฅ๐‘–๐‘๐‘– = 0 ร— 25/36+1 ร— 10/36+2 ร— 1/36 = 10/36+2/36 = 12/36 = ๐Ÿ/๐Ÿ‘

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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.