Question

The traffic light at the center of town is green for 45 seconds, then yellow for 5 seconds, then red for 40 seconds, at which point the cycle repeats. If a car approaches the traffic light at a random time, what is the probability that the traffic light will be green?

Answer 1

1/2

Explanation:

Answer 2

1/2

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