Question

A personal computer system is composed of the processing unit, graphics board, and keyboard with reliabilities of 0.976, 0.785, and 0.893, respectively. this is a series system and even if one component fails, the computer will not function correctly. the reliability of this system is

Answer 1

The answer is "0.684".

we can calculate the reliability of the system by multiplying reliabilities of the processing unit, graphics board, and keyboard 
reliability of processing unit = 0.976
reliability of graphics board = 0.785
reliability of keyboard = 0.893

reliability of the system = 0.976 x 0.785 x 0.893

= 0.684