The Gap Between Two Lifetimes
Two components have independent lifetimes, each exponentially distributed with mean 1 year. What is the expected value of the absolute difference between their lifetimes, in years?
Related problems & prerequisites
Worth solving first
- Twice as Long 3.0/10
- A Clock and a Fuse 3.0/10
- The Quiet Line 3.0/10
Source: Classic exponential-distribution exercise in wide circulation; no traceable original source. Statement written for AxiomIQ.