Question: you have ten pairs of socks five pairs blue and...
You have ten pairs of socks, five pairs blue and five pairs black, but they are not paired up. Instead, they are all mixed up in a drawer. It’s early in the morning and you don’t want to turn on the lights in your dark room.
a. Using the pigeonhole principle, how many must you pull out to have a black pair and a blue pair of socks?