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Ex 13.4, 10 - Chapter 13 Class 12 Probability (Term 2)
Last updated at Feb. 15, 2020 by Teachoo
Mean or Expectation of random variable
Chapter 13 Class 12 Probability
Concept wise
- Conditional Probability - Values given
- Conditional Probability - Statement
- Multiplication rule of probability
- Independent events
- Basic Probability
- Theorem of total probability
- Bayes theorem
- Random Variable - Defination
- Probability distribution
-
Mean or Expectation of random variable
- Variance and Standard Deviation of a Random Variable
- Bernoulli Trials
- Binomial Distribution
Transcript
Ex 13.4, 10 Find the mean number of heads in three tosses of a fair coin.Ex 13.4, 10 Find the mean number of heads in three tosses of a fair coin.So the Probability distribution The mean number is given by π=πΈ(π₯)=β2_(π = 1)^πβπ₯πππ = 0 Γ 1/8+"1 Γ" 3/8+ 2 Γ 3/8+ 3 Γ 1/8 = 0 + 3/8+ 6/8+3/8 = 12/8 = 3/2 = 1.5
