Question

A traffic light’s cycle is as follows: • green for 63 seconds • yellow for 7 seconds • red for 28 seconds • repeat suppose a car approaches the traffic light at a random time, what is the probability that the light will be green?

Answer 1

You do part divided by whole
Total seconds =98 seconds (63+7+28)
63 seconds/98 seconds =0.6429 or 64.29%

Answer 2

The probability that the traffic light will be green If a car approaches the traffic light at a random time is; 9/14

How to find the probability?

Probability is defined as the ratio of the number of possible outcomes to the total number of outcomes. The probability of an event can therefore not be more than 1.

We are given;

Time for green light = 63 seconds.

Time for yellow light = 7 seconds.

Time for red light = 28 seconds.

Total time = 63 + 7 + 28

Total time =  98 seconds

The probability that the traffic light will be green = 63/98 = 9/14

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