An Electrical Power System Consists of Four Major Components with Reliabilities

Multiple Choice

An electrical power system consists of four major components with reliabilities of 0.99,0.90,0.80,and 0.95.If the designers want to improve the reliability of the system by adding a backup component,which component should get the backup to achieve the highest reliability?

A) Component 1
B) Component 2
C) Component 3
D) Component 4