# exam1a - MATH230 Spring 2006 Exam 1a Name Section...

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MATH230 Spring 2006 Exam 1a Name:________________________________ Section:___________ Instructions: 1. Do not start until instructed to do so. 2. You may use a calculator and one 3x5 card (front and back) with notes, but nothing else. 3. SHOW ALL WORK to receive full credit. 4. Circle your answers. 5. Report answers that are probabilities to 4 decimal places. 6. The work you turn in must be your own. 1

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6 points The route used by a certain motorist in commuting to work contains two intersections with traffic signals. The probability that he must stop at the first signal is .4, the probability that he must stop at the second signal is .5, and the probability that he must stop at at least one of the two signals is .6. What is the probability that he must stop at both signals? Questions 2 – 4 : Let { } 5 , 4 , 3 , 1 = A and { } 2 , 1 , 0 = B be subsets of { } 5 , 4 , 3 , 2 , 1 , 0 = U . 2. 3 points List the elements of B A . 3.
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## This note was uploaded on 04/27/2009 for the course MATH 230 taught by Professor Crissinger during the Spring '08 term at University of Delaware.

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exam1a - MATH230 Spring 2006 Exam 1a Name Section...

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