WARNING: If you haven't see this paradox before (and probability isn't your thing), it may seem like math is broken here. I just want to say that it's not and it took me A LOT of thinking to finally see why. I encourage you to watch the video and see what conclusions you come to, but then check out the follow up video ( ), or pinned comment, for more of an explanation about what's going on. STEMerch Store: What is the chance that a parent has two daughters, given the fact that they have two children, at least one of which is a girl named Julie? Book that I reference (The Drunkard's Walk): See pinned comment for additional information. ►References (note, even some of the sources don't fully agree) Instagram: Twitter: Join Facebook Group: ►Support the Channel Patreon: PayPal(one time donation): ►My Setup: Space Pictures: Magnetic Floating Globe: Camera: Mic: Tripod: Equilibrium Tube: ►Check out the Amazon Store: