Xiphiqo: Tidazini Timbirhi na Chipi Yin'we

Xiphiqo

U bheja $10 eka dazinixibejoDazini1–12, 13–24 kumbe 25–36, yi hakela 2:1.Hlaya hinkwaswo → yo sungula, $10 eka dazini ya vumbirhi na $1 eka zerovhilwaZeroKhamara yin'we ya rihlaza leyi ku nga riki na xibejo xa mali yo ringana, xa dazini kumbe xa kholomu lexi yi funengetaka; xihlovo xa vuyelo bya khasino. Nakambe: zero yin'we, 0.Hlaya hinkwaswo →. (a) Xana i yini mimbuyelo leyi kotekaka na minkoteko ya yona? (b) Xana ntsengo lowu languteriweketinhlayoNtsengo lowu languteriwekeMbuyelo wa xiringaniso hi xibejo hi nkarhi wo leha. −1/37 wa mali ya xibejo eka xibejo xin'wana na xin'wana xa ntolovelo xa le Yuropa.Hlaya hinkwaswo → i wihi? (c) Xana chipimaliChipiXikombiso lexi yimelaka mali leyi vekiweke, lexi vekiwaka eka mepe wa tafula ku endla xibejo. Nakambe: check.Hlaya hinkwaswo → ya zero yi antswisa xibejo?

Nhlamulo (a) na (b)

Mimbuyelo: boloswitirhisiwaBoloBolo leyitsongo leyi hoxiwaka endleleni yi kongoma hi tlhelo leri kanetanaka na rotor. Tibolo ta manguva lawa i ta ivorine kumbe Teflon, 18–21 mm.Hlaya hinkwaswo → eka 1–24 (tikhamaraswitirhisiwaKhamaraYin'we ya tikhamara ta 37 leti nga na tinomboro eka rotor. Nakambe: slot, cup.Hlaya hinkwaswo → ta 24): dazini yin'we yi hakela $20, leyin'wana yi lahlekeriwa hi $10, zero yi lahlekeriwa hi $1: mpindzulo +$9. Bolo eka 25–36 (tikhamara ta 12): tidazini hinkwato timbirhi ta lahlekeriwa, zero ya lahlekeriwa: −$21. Bolo eka zero (khamara ya 1): tidazini ti lahlekeriwa hi $20, zero yi hakela $35: +$15. EV = (24 × 9 + 1 × 15 − 12 × 21)/37 = (216 + 15 − 252)/37 = −21/37 ≈ −$0.57 eka rhendzeleko eka $21 leyi bhejiweke: 2.70%.

Nhlamulo (c)

Handle ka chipi ya zero: (24 × 10 − 13 × 20)/37 = (240 − 260)/37 = −20/37 ≈ −$0.54 eka $20 leyi bhejiweke, na yona 2.70%. Chipi ya zero yi hundzule mbuyelo wa zero wa −$20 wu va +$15 (ku antswa hi $35 kan'we eka 37, leswi ringanaka $0.95 eka rhendzeleko) naswona yi durhe $1 eka marhendzeleko man'wana ya 36 (leswi ringanaka $0.97 eka rhendzeleko). Ku cinca hinkwako: −$0.03 eka rhendzeleko, leswi nga 2.70% ya dolara leyi engeteriweke. Inxuwarensi yi durha hi ku kongoma ku fana na swin'wana hinkwaswo.

Hikwalaho ka yini leswi swi tirha hinkwako

Mintsengo leyi languteriweke ya hlanganisiwa. Ntlawa wun'wana na wun'wana wa swibejo leswi vekiweke hi nkarhi wun'we wu na EV leyi ringanaka na nhlanganiso wa ti-EV ta swiphemu, xin'wana na xin'wana xi ri −1/37 ya mali ya xona ya xibejo. Hikwalaho nhlanganiso wun'wana na wun'wana i −1/37 ya mali hinkwayo ya xibejo. A ku na nxaxamelo wa tichipi eka mepe wa tafulaswitirhisiwaMepe wa tafulaGridi ya ku bheja leyi kandziyisiweke eka tafula. Nakambe: tafula, felt, lapi.Hlaya hinkwaswo →, hambi ti tala ku fikela kwihi, lowu balekaka leswi; xitirhisiwa xa Muaki wa Swibejo xi ta swi tiyisisa eka ntlawa wun'wana na wun'wana lowu u nga wu vekaka. Leswi minhlanganiso yi swi cincaka i ku hangalaka: u hlula kangani, hi mali yo tanihi kwihi, na leswaku xiyimo xo biha ngopfu xi biha ku fikela kwihi.

Xiphiqo lexi landzelaka lexi tikaka

Kuma nhlanganiso wa swibejo swa ntolovelo lowu khomaka tinomboro hinkwato ta 37. Tidazini tinharhu ($10 yin'wana na yin'wana) ku engetela $1 eka zero: yin'wana na yin'wana ya 1–36 yi nyika −$1 (dazini yin'we yi hakela $20, leti timbirhi ti lahlekeriwa hi $20, zero yi lahlekeriwa hi $1), naswona zero yi nyika +$35 − $30 = +$5. EV = (36 × (−1) + 5)/37 = −31/37 eka $31 leyi bhejiweke: 2.70%. U nga tiyisekisa leswaku a wu nge pfuki u hlamarisiwile, naswona wa ha hakela nxavo lowu fanaka eka lunghelo rero.

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