Answer: priori probability
Step-by-step explanation:
The priori probability can be defined as the probability which is calculated by observing the circumstances and already available information related to the situation.
It is usually related with independent events the likelihood of occurrence of one event is not influenced by the occurrence of the previous events. This kind of probability calculation is based on the observation or on the basis of the personal judgment. For example the outcomes obtain after tossing of coin will be independent at each trial.