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# ExtraQuestionsP1 - Practice Problems for Prelim 1 Econ 319...

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Practice Problems for Prelim 1 Econ 319 - Introduction to Probability and Statistics Fall 2008 Cornell University Prof. Molinari 1. Suppose that a box contains one blue card and four red cards, which are labeled A, B, C, and (a) If it is known that card A has been selected, what is the probability that both cards are red? (b) If it is known that at least one red card has been selected, what is the probability that both cards are red? at random, without replacement, determine the probability distribution of the number of red balls that will be obtained. 3. Suppose a coin is such that the probability of a head is 0 : 25 and the probability of a tail is 0 : 75 . Suppose the coin is tossed 3 times. Let X be a random variable which is the number of heads times the number of tails. For each point in the sample space determine the number x that corresponds to X . Compute the probability distribution of X: 4. Let f ( x )

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## This note was uploaded on 10/19/2008 for the course ECON 3190 taught by Professor Hong during the Fall '07 term at Cornell.

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ExtraQuestionsP1 - Practice Problems for Prelim 1 Econ 319...

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