bayesian using R

1.A probability value must be non- negative(i.e.,zeroorpositive).
2. The sum of the probabilities across all events in the entire sample space
must be1.0(i.e.,one of the events in the space must happen, otherwise
the space does not exhaust all possibilities).
3. For any two mutually exclusive events, the probability that one or the
other occurs is the sum of their individual probabilities.

The
probability of a twister game spinner stopping in a sector is 1/N, and the width of a sector is 1/N, so
the ratio is (1/N)/(1/N)=1.That ratio is called the probability density.