Answer:
Pulling out a left shoe from a dark closet. It is a 20/40 chance or a 50% chance.
The reason it's not listening to the first song on a playlist of 5 songs on shuffle mode is because it's a 1/5 chance or 20% chance. 50 is obviously larger than 20. So you have a greater chance of pulling out a left shoe from a dark closet with 20 pairs of shoes than when listening to a playlist with 5 songs on shuffle mode listening to the first song.
my oh my was that a mouthful.