grandes-ecoles 2016 QIV.A.2

grandes-ecoles · France · centrale-maths1__psi Binomial Distribution Derive or Prove a Binomial Distribution Identity
Let $p \in ]0,1[$. Let $X_1, \ldots, X_n$ be mutually independent random variables, defined on a probability space $(\Omega, \mathcal{A}, P)$ and following the same Bernoulli distribution with parameter $p$.
What is the distribution of $S = X_1 + \ldots + X_n$? A proof of the stated result is expected.
Let $p \in ]0,1[$. Let $X_1, \ldots, X_n$ be mutually independent random variables, defined on a probability space $(\Omega, \mathcal{A}, P)$ and following the same Bernoulli distribution with parameter $p$.

What is the distribution of $S = X_1 + \ldots + X_n$? A proof of the stated result is expected.