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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