Likelihood 

Likelihood is the probability of a condition occurring for a given event. In our example, likelihood means what the probability is of the temperature being between 20°F to 32°F when it snows. Based on the data in the dataset, there is a 66.66% probability that the temperature is 20°F-30°F when it snows. Training data can be used to calculate the probability of each discrete value in the feature set.