Concept explainers
To find : the probability that the light being green when you first see it.
Answer to Problem 32E
The experimental probability that the light will be green is is
Explanation of Solution
Given information :
Consider, the information provided in the question,
A traffic light is green for 17 seconds, yellow for 3 seconds, and red for 20 seconds.
Calculation :
Total number of trials is the sum of the numbers of seconds green signal, yellow signal and red signal. Therefore, total number of free trials is
Among these 40 seconds for 17 seconds the signal is green. Therefore, the experimental probability that the light will be green is
Hence, the experimental probability that the light will be green is
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