Mean number of Multiple Parton Interactions, $\langle N_{\rm{MPI}}\rangle$, as a function of mean charged particle multiplicity at midrapidity, $\langle {\rm d}N_{\rm{ch}}/\rm{d}\eta \rangle_{|\eta|0.5}$, for different event selections, calculated with the PYTHIA 8.2 model (Monash 2013 tune) .