Question: With reference to Exercise 3.85, find the distribution function of the random variable X and plot its graph. In exercise A coin is biased so

With reference to Exercise 3.85, find the function of the random variable X and plot its graph.
In exercise
A coin is biased so that heads is twice as likely as tails. For three independent tosses of the coin.
Use the function of X to find
(a) P(1< X ≤ 3);
(b) P(X > 2).

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