2011-01-08, 03:37 AM
Milelke Wrote:Don't overcomplicate things guys.
If one coin is already H, the other coin has a 50% chance of being heads or tails. The other coin is heads no matter what, so you already have Hx, x being the other coin, so the chance of them both being heads is 50% because the chance of the unflipped coin being heads is 50%, i think.
uh... no. It's only 50% if you know WHICH of the two coins is already a heads.
Since you dont, you have three posibilities: HH, HT, TH. So the posibility that both are heads is 1/3rd.