Question 10 - Mean or Expectation of random variable - Chapter 13 Class 12 Probability

Last updated at August 19, 2026 by

Ex 13.4, 10 - Find mean number of heads in three tosses of a fair coin

Ex 13.4, 10 - Chapter 13 Class 12 Probability - Part 2

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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

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