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Mean or Expectation of random variable
Mean or Expectation of random variable
Last updated at Feb. 15, 2020 by Teachoo
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