Priori probability

Could anyone please explain or give me example about priori probability?

It’s “a priori” probability.

Given a coin you’ve never tossed before, the a priori probabilities you assign to tossing heads and tossing tails will likely be \frac12 and \frac12, respectively.

Given a die you’ve never rolled before, the a priori probabilities you assign to rolling 1, 2, . . ., 6 will likely be \frac16, \frac16, . . ., and \frac16, respectively.

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A priori probability is based on logical analysis.
If there is you + 4 friends competing over 1 ticket show, there is a 20% probability that you’ll win
It’s pure logical/deductive reasoning

And certain assumptions, such as assigning equal probabilities to congruent outcomes.

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