Multiple ChoiceIntermediate 45s
Availability math
If a service depends on two components in series each with 99.9% availability, what is the combined availability (assuming independent failures)?
Options
- 199.9% (the slower component governs)
- 299.8% (0.999 × 0.999 ≈ 0.998)
- 399.99% (0.999 + 0.999 added)
- 4100% (both stay fully available)
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