Le Monde puzzle [#907]
A combinatorics (?) Le Monde mathematical puzzle:
Each day of 2014, more than half of the 365 Paris métro drivers are at work. What is the minimal number of drivers one should consider to be sure to include at least a driver for each day of the year?
I may be missing an item of information from the puzzle: since at least 183 drivers are at work every day, if I select 183 drivers at random, there remain 182 further drivers. Even in the most extreme case where the 182 further drivers are at work every day of the year, there will be at least one of the 183 selected drivers at work every day. Conversely, if I select 182 or less drivers, one configuration is that the 183 or more remaining drivers are the ones always at work…