2011-01-07, 04:29 PM
shouri Wrote:Easily done~
You and your friend are having a bet. He flips a nickel and a penny and hides them under a bowl while you were turned around. Your friend knows the outcome already, but you don't. Seems really difficult to guess what it landed on though... so he tells you: "At least 1 of the coins was heads." (he has to tell the truth otherwise when he removes the bowl you'll know he cheated you). To win you must guess what each different coin landed on. You want to guess that they're both heads. You're calculating the odds to see how likely you are to guess it right... (with the math from my earlier post) you realize that you have a 1/3 shot of getting it right... so if he offers you 4:1 you should take his bet
Did you know that a nickel and penny are not made of the same material? But yes this is one way.