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hwk139_3-S11
Course: ECE 139, Spring 2011School: UCSB
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OF UNIVERSITY CALIFORNIA, SANTA BARBARA Department of Electrical and Computer Engineering ECE 139 Probability and Statistics Spring 2011 Homework Assignment #3 (Due on Tuesday 4/19/2011 by 8 pm in the Homework Box) A. Solve the following problems in the textbook: 1.6.4, 1.6.5, 1.7.4, 1.7.6, 1.8.2, 1.9.1, 1.9.3. B. Solve an additional problem: A and B are mutually exclusive events with probabilities P (A) and P...
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OF UNIVERSITY CALIFORNIA, SANTA BARBARA
Department of Electrical and Computer Engineering
ECE 139
Probability and Statistics
Spring 2011
Homework Assignment #3
(Due on Tuesday 4/19/2011 by 8 pm in the Homework Box)
A. Solve the following problems in the textbook: 1.6.4, 1.6.5, 1.7.4, 1.7.6, 1.8.2, 1.9.1,
1.9.3.
B. Solve an additional problem: A and B are mutually exclusive events with probabilities P (A) and P (B ), respectively. Independent of trials the experiment are performed to
see which one of the two occurs rst. What is the probability that event A occurs before
event B ?
Next solve a similar problem for the case where A and B are independent events (and
not mutually exclusive). What is the probability that B does not occur before A? (Here we
allow for the possibility that they occur simultaneously). Note: Answers to part B should
only be in terms of P (A) and P (B ).
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