Q3. Suppose you toss n “fair” coins (i.e., heads probability = 1/21/2). For every coin that came up tails, suppose you toss it one more time. Let X be the random variable denoting the number of heads in the end.
What is the range of the variable X (give exact upper and lower bounds)
What is the distribution of X? (Write down the name and give a convincing explanation.)
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