KöMaL 2005 A381
A die of faces is rolled until each of the possible outcomes is obtained at least once. What is the expected value of the number of rolls needed?
Official text KöMaL. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
Similar problems
These problems have the most words in common with this statement.