Question

26 points A stoplight has the following cycle: green for 25 seconds, yellow for 4 seconds, and red for 2 minutes. What is the probability that the light will be green when you arrive to the nearest hundredth?

0.17
0.03
0.83
0.81

Answer 1

0.17

Explanation:

Time for green = 25 sec

Time for yellow = 4 sec

Time for red = 2 x 60 sec = 120 sec

Total time = 149

Probability of getting green = (time of green)/ (total time)

= 25/149

=0.169

Approximately = 0.17

Answer 2

25+4+120(2min) = 149

25/149 = 0.16778523489932885906040268456376

= (rounded) 0.17