  We study the full probability distribution of the charge transmitted through
a mesoscopic diffusive conductor during a measurement time T. We have
considered a semi-classical model, with an exclusion principle in a discretized
single-particle phase-space. In the large T limit, numerical simulations show a
universal probability distribution which agrees very well with the quantum
mechanical prediction of Lee, Levitov and Yakovets [PRB {51} 4079 (1995)] for
the charge counting statistics. Special attention is given to its third
cumulant, including an analysis of finite size effects and of some experimental
constraints for its accurate measurement.
