What is the probability of arriving at a traffic light when it is red if the red signal is flashed for 35 sec, the yellow signal for 5 sec, and the green signal for 60 sec?
A) The probability is 0.30
B) The probability is 0.35
C) The probability is 0.45
D) The probability is 0.40

Question

Quizplus · Accepted Answer

The total cycle time of the traffic light is 35 (red) + 5 (yellow) + 60 (green) = 100 seconds. The red light is on for 35 seconds out of these 100 seconds. Therefore, the probability of arriving during the red light is 35/100 = 0.35.

What Is the Probability of Arriving at a Traffic Light