In reliability engineering, the failure rate for a complex system is the sum of the individual failure rates of its components [1]. I will let you do the math.

In reliability engineering, the failure rate for a complex system is the sum of the individual failure rates of its components [1]. I will let you do the math. [1] https://en.wikipedia.org/wiki/Failure_rate#Additivity https://en.wikipedia.org/wiki/Failure_rate#Additivity