01/12/2015 Coin dealer pays nearly $2.6 million for rare American penny
By Michael Fleeman LOS ANGELES (Reuters) - A Beverly Hills rare coin dealer purchased a 1792 American penny for nearly $2.6 million, the most ever paid for a one-cent piece at auction. Named after its engraver, Robert Birch, the so-called "Birch Cent" was among the first pennies struck for the United States, part of a series of prototype coins. Only 10 are believed to exist and collector Kevin ...
01/13/2015 How Do You Model This Coin Flip Bet?
If you flip a coin 100 times and win 20 dollars or lose 10, how much money would you win? Here is a numerical model of this game. The post How Do You Model This Coin Flip Bet? appeared first on WIRED .