We discuss the distribution function for the current noise in quantum point contacts. Special interest is paid to a contact of a superconductor with a normal metal. A new derivation of the Lesovik-Levitov formulae is suggested. It is shown, for the SN contacts, that the distribution of the noise describes independent processes when charge ± e0or ±2 e0 passes through the contact. At low temperature and voltage only processes with double charge transfer are relevant. At zero temperature and low voltage the distribution has a binomial form.