![Ex 13.4, 10 - Chapter 13 Class 12 Probability - Part 2](https://d1avenlh0i1xmr.cloudfront.net/7c3f3cb3-0189-43de-9887-827ca9366348/slide34.jpg)
Mean or Expectation of random variable
Mean or Expectation of random variable
Last updated at April 16, 2024 by Teachoo
Question 10 Find the mean number of heads in three tosses of a fair coin.Question 10 Find the mean number of heads in three tosses of a fair coin.So the Probability distribution The mean number is given by 𝜇=𝐸(𝑥)=∑2_(𝑖 = 1)^𝑛▒𝑥𝑖𝑝𝑖 = 0 × 1/8+"1 ×" 3/8+ 2 × 3/8+ 3 × 1/8 = 0 + 3/8+ 6/8+3/8 = 12/8 = 3/2 = 1.5