A BA is performing 'Interface Analysis'. If a system has 5 external interfaces and each interface has a 5% chance of failure daily, what is the probability that at least one interface fails on any given day? (Rounded)https://go-math-science.com/computing/software-engineering/requirements-engineering/cbap-certification-practice-exams/cbap-practice-examp-2/a-ba-is-performing-interface-analysis-if-a-system-has-5-external-interfaces-and-each-interface-has-a-5-chance-of-failure-daily-what-is-the-probability-that-at-least-one-interface-fails-on-any-given-day-roundedhttps://go-math-science.com/@@site-logo/logo-new.png
volume_mute
A BA is performing 'Interface Analysis'. If a system has 5 external interfaces and each interface has a 5% chance of failure daily, what is the probability that at least one interface fails on any given day? (Rounded)
publish date: 2026/03/09 05:22:37.940305 UTC
volume_mute
Correct Answer
23%
Explanation
Probability of no failures =\(0.95^5\) = 0.773.
Probability of at least on failure = 1 - 0.773 = 0.226 or 23%
