Homework1Solutions

Homework1Solutions - Steven Weber Dept. of ECE Drexel...

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Unformatted text preview: Steven Weber Dept. of ECE Drexel University ENGR 361: Statistical Analysis of Engineering Systems (Spring, 2008) Homework 1 Solutions (Monday, March 31) Question 1: Exercise 6, 2.1, p51. A college library has five copies of a certain text on reserve. Two copies (1 and 2) are first printings, and the other three (3, 4, and 5) are second printings. A student examines these books in random order, stopping only when a second printing has been selected. One possible outcome is 5, and another is 213. List the outcomes in S . S = { 123 , 124 , 125 , 213 , 214 , 215 , 13 , 14 , 15 , 23 , 24 , 25 , 3 , 4 , 5 } . (1) Let A denote the event that exactly one book must be examined. What outcomes are in A ? A = { 3 , 4 , 5 } . (2) Let B be the event that book 5 is the one selected. What outcomes are in B ? B = { 125 , 215 , 15 , 25 , 5 } . (3) Let C be the event that book 1 is not examined. What outcomes are in C ?...
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