Definition of Probability: frequencies, classical definition and subjective definition. Axiomatic definition of probability space: events, sigma-algebra, probability, first calculation rules and continuity of the probability measure. Indipendence and conditioning: total probability and Bayes theorem. Borel-Cantelli lemma. Random variables: distribution function and its properties. Continuous and discrete random variables (Bernoulli, Binomial, Geometric, Negative Binomial, Ipergeometric, Normal, Uniform, Cauchy, Exponential, Gamma, Chi-Square, t Student,...). Multidimensional random variables, indipendence. Moments. Moment generating function and characteristic function. Inequalities: Markov and Chebyshev. Asymptotics: convergence in law, convergence in probability, almost sure convergence, normal limit of the binomial distribution, law of large numbers, central limit theorem. Conditional expecation. Stochastic simulation.