Answer:
1/2
Step-by-step explanation:
Probability is the ratio of the number of possible outcomes to the total number of outcome. The probability of an event cannot be more than 1.
Given that the green stays for 45 seconds, the yellow for 5 seconds, then red for 40 seconds, the total time
= 45 + 5 + 40
= 90 seconds
The probability that the traffic light will be green
= 45/90
= 1/2
