The probability of an event is the ratio of the number of favourable outcomes to the number of all possible outcomes. How many possible outcomes are there in the given model?
Example Event: The light turning red
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We want to describe an event with a 33 % probability for the given model. The given model is a stoplight.
Remember that the probability of an event is the ratio of the number of favorable outcomes to the number of all possible outcomes. In this model, there are 3 possible outcomes: the light turning green, yellow, or red. Note that 33 % is approximately 13. For our event to have a probability of 13, it must have 1 favorable outcome. One example of such an event is the light turning red.
