Variance
One measure of how wide di results dey spread around di expected value. E high for straight up, e low for even-money bets.
For context
Var for each unitmoniUnitDi base stake wey system or player dey work with. Dem dey describe progressions in units so dat dem go fit work for any table.Read di whole tin → = p·W² + (1 − p) − EV². About 34 for straight upbetStraight upOne single number, e dey pay 35:1.Read di whole tin →, about 1 for redbetRedEven-money bet on di 18 red numbers. For French: rouge.Read di whole tin →, with di same expected lossmathsExpected lossExpected value times di total moni wey you bet; di average amount wey you go lose for one session or one period.Read di whole tin →.
Session of straight-up bets fit finish with profit of several hundred dollars while neighbour wey dey bet red finish with $20 loss, and both players face exactly di same house edgemathsHouse edgeDi part of each stake wey di casino dey keep for average: 2.70% for European roulette.Read di whole tin →.