Fundamentals of Probability and Statistics for Engineers

(John Hannent) #1
for j 1, 2, 3, where Sj is the event that a driver is stopped by the jth light. We
assume a ‘one-light’ memory for the system. By means of the tree diagram,
determine the probability that a driver:
(a) Will be delayed by all four lights.
(b) Will not be delayed by any of the four lights.
(c) Will be delayed by at most one light.

Basic Probability Concepts 35


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