Red faces on a diced cube
A cube is painted red on all outer surfaces, then cut into unit cubes. One unit cube is chosen uniformly at random. What is the expected number of red faces it has?
Show hints (2)+
- Total painted unit-faces = surface area of the big cube .
- Divide by the unit cubes.
Answer
Reveal answer →Final answer
0.6
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Asked at: Jane Street, Optiver