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If random variable X counts the number of coin flips to get a Tail, then it has the following PDF X 2 3 4 K

If random variable X counts the number of coin flips to get a Tail, then it has the following PDF X 2 3 4 K f(x) W/ N 2 2 O/N 2 27 81 3k What is P (x 2 3) O 2/3 O 2/9 O 1/9 8/9

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