Drunk man and keys problem
<p>The drunk man and keys problem is a simple but interesting probability problem.</p>
<p>A drunk man, returning home, is trying to open his house door with a bunch of keys. There are 10 keys in the bunch, but only 1 fits the door. He selects a key at random. If it fits the door he lets himself in, but if it doesn’t fit he tries again. Because he is drunk, he doesn’t remember which keys he has already tried, so he makes a totally random choice from the 10 keys each time.</p>
<p>The question is, on which attempt is he most likely to get in?</p>
<p><a href="https://medium.com/recreational-maths/drunk-man-and-keys-problem-37df70a0cf15"><strong>Learn More</strong></a></p>