# John is going to buy baseball cards until he gets his favorite player. John only has...

###### Question:

John is going to buy baseball cards until he gets his favorite player. John only has enough money to buy 5 packs of cards. Suppose that each pack has a 1 out of 5 chance of containing the card John is looking for Let the random variable X be the number of packs of cards John buys. Compute the probability mass function for X, and compute P(X2 3).

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