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Econ 261 Problem Set 2 Qs

# Econ 261 Problem Set 2 Qs - ECO 261-Sections IV&V Fall 2007...

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ECO 261-Sections IV&V- Fall 2007 Problem Set-2 Due by September 27, Thursday 1) A corporation takes delivery of some new machinery that must be installed and checked before it becomes available to use. The corporation is sure that it will take no more than 7 days for this installation and check to take place. Let A be the event °It will be more than 4 days before the machinery becomes available°and B the event °It will be less than 6 days before the machinery becomes available.° a) Describe the event that is complement of A. b) Describe the event that is the intersection of A and B. c) Describe the event that is the union of events A and B. d) Are the events A and B mutually exclusive. e) Show that ( A \ B ) [ ( ° A \ B ) = B: f) Show that A [ ( ° A \ B ) = A [ B: 2) a) The sample space contains 10 A±s and 6 B±s. What is the probability that a randomly selected sample set of 4 will include 2 A±s and 2 B±s? b) The sample space contains 6 A±s and 4 B±s. What is the probability that a randomly selected sample set of 3 will include 1 A and 2 B±s?

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Econ 261 Problem Set 2 Qs - ECO 261-Sections IV&V Fall 2007...

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