Independent spin inna roulette
Evry spin start fram nutten.

Wah happen pon one spin nuh have no effec pon di nex one. Evry calculation pon dis site stand pon dat fact.
Wah independence mean
p(redbet demRedEven-money bet pon di 18 red numba. Inna French: rouge.Read di whole ting → pon spin 2 | red pon spin 1) = p(red) = 18/37. Fi tek history inna account nuh change nutten. Hot numbamyth demHot numbaA numba weh come up more dan expected lately. Pon a fair wheel it nuh predict nutten.Read di whole ting →, cold numbamyth demCold numbaA numba weh nuh come up fi nuff spin. Pon a fair wheel it nuh tell yuh nutten bout di spin dem weh a come.Read di whole ting → an colour weh “due” a description a di pas, nuh forecast, an each one a dem stand pon di wrong claim seh roulette spin nuh independent. Formally, di joint probabilitymathsProbabilityDi chance fi a result, fram 0 to 1 or 0% to 100%. One numba: 1/37 = 2.70%.Read di whole ting → a any sequence a di product a di one-spin probability dem, an dat a di only reason why di multiplication rule pon di probability page allow.
Wah mek “roulette spin nuh independent” wrong by physics
Di dealer launch di ballgearBallDi likkle ball weh di dealer fling roun di track di opposite way to di rotor. Modern ball mek outta ivorine or Teflon, 18–21 mm.Read di whole ting → by hand at a speed weh vary by tenths a a metre a second; it go roun a track weh di friction change wid dust an humidity; it lick one a eight deflectorgearDeflectorOne a di metal block dem pon di apron weh scatter di ball wen it a drop. Nex name: canoe, diamond, pin.Read di whole ting → at a angle weh all a dat set; it bounce cross fretgearFretDi metal divider between two pocket pon di wheel (di likkle wall between pocket).Read di whole ting → weh effec pon a ball at 1 m/s chaotic inna di technical sense. Nutten bout di las result survive inna any a dem variable deh. Di rotorgearRotorDi part a di wheel weh spin an carry di pocket dem.Read di whole ting → a di same rotor, an dat a di one place weh dependence coulda hide, an dat a di wheel-bias question.
Wah follow fram it
Evry bettin system a function a pas result. If pas result nuh carry no information bout di nex spin, no function like dat cyaan improve di expected valuemathsExpected valueDi average result pon evry bet inna di long run. −1/37 a di stake fi evry standard European bet.Read di whole ting → a di nex bet. Dis a di formal version a di argument gainst system, an a dat mek di strategy page dem can write up front fi system weh nobaddy neva invent yet: di proof nuh depend pon di rule.
Wen it woulda fail
Only if di wheel did bias by physics or yuh coulda predict ow di dealer release di ball. Dem a Lab topic. Even deh suh, di dependence a pon physics, nuh pon di las result dem: a bias pocketgearPocketOne a di 37 compartment wid numba pon di rotor. Nex name: slot, cup.Read di whole ting → more likely evry spin, nuh more likely afta it did “cold”. Di data fram di las spin dem woulda be evidence bout di wheel, an dat a different ting fram a pattern inna di result dem.
Independence a a assumption
Yuh can multiply chance only wen di event dem independent, an a roulette wheel earn dat right by physics. Anyweh else, yuh haffi check it. Inna 1999 Sally Clark, a English solicitor, get convict fi murda her two baby son. A pediatrician tell di jury seh di chance fi two crib death inna a family like fi her a 1 outta 73 million, a figure him get by squarin 1 outta 8,543, di chance fi one. Fi square it treat di two death like two spin a a wheel. But brodda share gene an a home, suh afta one crib death a second one much more likely dan di fus one did be. Di Royal Statistical Society seh suh in public inna 2001, an Clark conviction get quash pon a second appeal inna 2003, afta medical evidence weh dem neva disclose come to light. Hunacek (2025) use di case fi teach di rule weh dis page stand pon: multiply only wah independent.
Independence an RNG table
Software table draw evry result fram a certified random numba generator weh dem test fi exactly dis property: serial independence cross millions a draw. Di animated wheel a jus decoration. A RNG table weh show dependence woulda fail certification, an dat a a stricter test dan any playa coulda run.
Question dem
Nuh inna one pocket. Maybe, wid nuff consistency, inna a sectorpon di wheelSectorA piece a di wheel weh di pocket dem follow one anodda roun di arc, nuh a group pon di betting layout.Read di whole ting → more often dan chance; see dealer signature inna di Lab. Studio change up di release fi stop it.
Fi bias analysis ova tousands a spin, inna theory. Fi di nex spin, no.
Fun wid maths
Try dem yuhself fus. Evry ansa fold up; open it wen yuh ready.
A bet weh yuh put dung bifo two spin pay even money if di second numba higha dan di fus. A tie lose, an 0 count as di lowest numba. Wah it cost pon a European wheel?
Show di ansa
Ansa Exactly 2.70%, di same as redbet demRedEven-money bet pon di 18 red numba. Inna French: rouge.Read di whole ting →.
Di two spin independent, suh di second numba have di same chance fi higha dan di fus as fi lowa. Di only odda case a a tie, di same numba two time, wid probabilitymathsProbabilityDi chance fi a result, fram 0 to 1 or 0% to 100%. One numba: 1/37 = 2.70%.Read di whole ting → 1/37.
Suh di bet win wid probability (1 − 1/37)/2 = 18/37, exactly di chance a red, an it cost di same 2.70%.
If yuh coulda put it dung afta yuh see di fus numba it woulda be a gift: afta a 0 it win 36 time outta 37. Dat a why a bet like dis haffi close bifo di fus spin.
Sumting fi laugh

Evry spin start fram nutten. Evry calculation yah so depend pon it.
Source dem
- Feller, W. An Introduction to Probability Theory and Its Applications, Vol. 1.
- Small, M. & Tse, C. K. “Predicting the outcome of roulette.”
- Hunacek, M. Quantitative Literacy Through Games and Gambling.
- Royal Statistical Society. “Statement regarding statistical issues in the Sally Clark case.”