Exercice 1 - Une me contient 12 boules rouge 3 mans
On incaltam bol
Calede la probabilite des vénement suits
A les trois boules sont to
3)
Bene boule de chancer
des boules
De des troba​

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?