A Bank Has Two Automatic Tellers at Its Main Office

Multiple Choice

A bank has two automatic tellers at its main office and two at each of its three branches. The number of machines that break down on a given day, along with the corresponding probabilities, are shown in the following table: Find the expected number of machines that will break down on a given day.

A) E = 1.76
B) E = 1.54
C) E = 0.71
D) E = 1.19