KöMaL 2007 B4001
Xenia, Yvette and Zoe are friends. On a certain day, each of them makes a one-hour visit in the same internet café that is open from 12 noon to 8 pm. Each visits at a random time, independently of the others. What is the probability that they all meet there?
Official text KöMaL. Quoted with source.
Solutions
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