英语翻译
AninternalstudybythetechnologyServicesdepartmentatLaheyElectronicsrevealedcompanyemployeesreceiveanaverageoftwoemailsperhour.AssumethearricaloftheseemailsisapproximatedbythePoissondistribution.
a.WhatistheprobabilityLindaLahey,companypresident,receivedexactly1emailbetween4P.M.and5P.M.yesterday?
b.Whatistheprobabilityshereceived5ormoreemailsduringthesameperiod?
c.Whatistheprobabilityshedidnotreceiveanyemailsduringtheperiod?