Basic Probability Notation: Prior Probability

P(X) = < P(X=x1), P(X=x2), ... >

P(X,Y) = < P(X=xi,Y=yi) >

Logical sentences are allowed, such as P(X and (not Y))

• P(Cavity) = 0.1
• The probability of a someone having a cavity is 1 in 10.