Glossary · math
Expected value
The average result per bet over the long run. −1/37 of the stake for every standard European bet.
In context
EV = p·win − (1 − p)·stake. In roulette the payoutmoneyPayoutWhat a winning bet returns, quoted as “X to 1” on top of the returned stake.Read full → rule makes the bet size cancel out: every bet is −2.70%.
Did you know
The concept was born in 1654 in letters between Pascal and Fermat about how to split the pot of an interrupted dice game, the “problem of points”.