SOLUTION: if 400 songs are on an iPod and 150 of those songs are disco songs, how many songs must be played in random order to ensure that at least one disco song is played?

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Question 645631: if 400 songs are on an iPod and 150 of those songs are disco songs, how many songs must be played in random order to ensure that at least one disco song is played?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
400-150=250 songs are not disco.
Therefore you must pick 250+1=251 to ensure you get at least 1 disco song.