Where to armour the planes
During the Second World War, analysts examined bombers returning from missions over Europe and recorded where they had been hit. The holes were concentrated on the wings, the tail and the middle of the fuselage; there were very few holes around the engines and the cockpit. Armour is heavy, so it can only be added in a few places.
The commanders proposed armouring the places with the most holes.
Was that right? Where should the armour go, and why?
Show a hint
The data came only from planes that made it back. Which planes are missing from the sample?
Your answer
Solving needs a free account
Answers, streaks and solutions unlock when you are signed in. Reading the question and the hint stays free.
Discussion
Sign in to join the discussion · reading is open to everyone
💡 Discussion rules
- No full solutions here. Hints and approaches only.
- Complexity, edge cases and intuition are the point.
- Interview experiences are welcome. Respect your NDAs.
Loading discussion…
Learn the concepts
The theory behind this question.
Related questions
The magazine cover jinxEstimating the average clan size from a survey of peopleWhy the handsome ones seem so unpleasantThe gambler's two betsThe epitaph of Diophantus
All questions →