Geometry

Question Analysis
This question involves conditional probability in the context of traffic light timings.
The main focus is on determining the probability of an event (the light being green) given that another event (the light not being red) has occurred.

Key Concept Explanation
First, we need to find the total time when the light is not red, which becomes the new sample space for calculating the conditional probability.
Then we use the ratio of the time the light is green within this new sample space to find the probability.

Step-by-Step Solution
The total time when the light is not red is seconds (green time + yellow time).
The time the light is green is 40 seconds.
So the probability that the light is green given that it is not red is

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