Ikibazo: Dazeni Ebyiri na Jeto Imwe

Ikibazo

Utega $10 kuri dazeniitegaDazeni1–12, 13–24 cyangwa 25–36, yishyura 2:1.Soma byose → ya mbere, $10 kuri dazeni ya kabiri na $1 kuri zeruuruzigaZeruAkazu kamwe k'icyatsi katafatwa n'itega ryishyura kimwe ku kindi, irya dazeni cyangwa iry'inkingi; ni ho inyungu ya kazino ikomoka. Nanone: zeru imwe, 0.Soma byose →. (a) Ibishobora kubaho ni ibihe n'amahirwe yabyo? (b) Agaciro gateganyijweimibareAgaciro gateganyijweIgisubizo mpuzandengo kuri buri tega mu gihe kirekire. −1/37 y'itega kuri buri tega risanzwe ry'i Burayi.Soma byose → ni akahe? (c) Ese jetoamafarangaJeto (chip)Jeto ihagarariye amafaranga angana atahinduka, ishyirwa ku mbonerahamwe y'amatega kugira ngo utege. Nanone: check.Soma byose → yo kuri zeru inoza itega?

Igisubizo (a) na (b)

Ibishobora kubaho: agapiraibikoreshoAgapiraAgapira gato koherezwa mu nzira kerekeza mu cyerekezo kinyuranye n'icya rotor. Udupira tw'iki gihe dukozwe muri ivorine cyangwa Teflon, mm 18–21.Soma byose → muri 1–24 (utuzuibikoreshoAkazuKamwe mu tuzu 37 twanditseho imibare turi kuri rotor. Nanone: slot, cup.Soma byose → 24): dazeni imwe yishyura $20, indi igatsindwa $10, zeru igatsindwa $1: inyungu nyayo +$9. Agapira muri 25–36 (utuzu 12): dazeni zombi zatsinzwe, zeru yatsinzwe: −$21. Agapira kuri zeru (akazu 1): dazeni zatsinzwe $20, zeru yishyura $35: +$15. EV = (24 × 9 + 1 × 15 − 12 × 21)/37 = (216 + 15 − 252)/37 = −21/37 ≈ −$0,57 kuri buri zunguruka ku $21 yategewe: 2,70%.

Igisubizo (c)

Nta jeto kuri zeru: (24 × 10 − 13 × 20)/37 = (240 − 260)/37 = −20/37 ≈ −$0,54 ku $20 yategewe, na byo 2,70%. Jeto yo kuri zeru yahinduye igisubizo cya zeru cya −$20 kiba +$15 (inyongera ya $35 rimwe muri 37, ifite agaciro ka $0,95 kuri buri zunguruka) kandi itwara $1 ku yandi mazunguruka 36 (agaciro ka $0,97 kuri buri zunguruka). Impinduka nyayo: −$0,03 kuri buri zunguruka, ari yo 2,70% by'idolari ry'inyongera. Ubwishingizi bufite igiciro kimwe neza n'ibindi byose.

Impamvu ibi bireba byose

Indangagaciro ziteganyijwe ziteranywa. Uruhurirane urwo ari rwo rwose rw'amatega ashyirwa icyarimwe rufite EV ingana n'igiteranyo cya EV z'ibice byarwo, buri kimwe kikaba −1/37 by'itega ryacyo. Bityo uruvange urwo ari rwo rwose ni −1/37 by'itega ryose. Nta buryo bwo gushyira amajeto ku mbonerahamwe y'amategaibikoreshoImbonerahamwe y'amategaImbonerahamwe yo gutega yanditse ku meza. Nanone: ameza, igitambaro cy'ameza.Soma byose →, yaba menshi angana ate, buhunga ibi; igikoresho Umwubatsi w'Amatega kizabyemeza ku ruhurirane urwo ari rwo rwose ushobora gushyiraho. Icyo uruvange ruhindura ni imigabane: uko utsinda kenshi, ingano, n'uko ibibi kurusha ibindi bimeze.

Ikibazo gikurikiraho gikomeye kurushaho

Shaka uruvange rw'amatega asanzwe rutwikira imibare yose 37. Dazeni eshatu ($10 kuri buri imwe) wongeyeho $1 kuri zeru: umubare uwo ari wo wose wo muri 1–36 utanga −$1 (dazeni imwe yishyura $20, izindi ebyiri zigatsindwa $20, zeru igatsindwa $1), naho zeru igatanga +$35 − $30 = +$5. EV = (36 × (−1) + 5)/37 = −31/37 ku $31 yategewe: 2,70%. Ushobora kwemeza ko nta kintu kizagutungura, ariko uracyishyura igiciro kimwe kuri ubwo burenganzira.

Formula

Ibibazo