Nqi xav tias yuav tau hauv roulette
Nqi xav tias yuav tau hauv roulette yog qhov tshwm sim nruab nrab ntawm ib qho kev twv yog koj rov ua tau mus ib txhis. Hauv roulette Europe nws zoo ib yam rau txhua qhov twv li qub: koj poob 1/37 ntawm txhua qhov nyiaj twv, raws qhov nruab nrab, ib zaus kiv.
Hais kom yooj yim
Xav txog tias koj muab tib qhov nyiaj twv $10 twv rau liab ib lab zaus. Qee zaus kiv yeej $10, qee zaus poob $10. Muab txhua qhov tshwm sim ntxiv ua ke thiab faib rau ib lab: koj yuav tau li −$0.27. Tus lej ntawd yog nqi xav tias yuav tau ntawm ib qho kev twv roulette. Nws tsis yog qhov tshwm sim ntawm ib zaus kiv twg; nws yog qhov nruab nrab mus ntev rau ib zaus kiv.
Tus qauv suav EV ntawm ib qho kev twv roulette
p = n/37 · W = S·(36/n − 1) · n = cov lej npog · S = nyiaj twv
Muab txoj cai nyiaj them roulette, 36/n − 1, tso rau, ces n tshem tawm. Ntawd yog tag nrho zaj dab neeg ntawm feem tsev twv txiaj hauv ib kab:
= S·(36 − n − 37 + n)/37
= −S/37
Sim saib: cuab yeej suav nqi xav tias yuav tau hauv roulette
Xaiv seb qhov twv npog pes tsawg tus lej. Feem tshwm sim thiab nyiaj them hloov; nqi xav tias yuav tau tsis hloov.
Nws zoo li cas raws sij hawm
Qhov tshwm sim nruab nrab ib zaus kiv rau qhov twv liab $10, thaum cov zaus kiv ntxiv zuj zus. Thaum pib, hmoov yog tus tswj; qhov nruab nrab uas suav mus tas li ruaj mus rau −$0.27 thaum cov piv txwv loj tuaj. Nov yog kev mus ntev los ze uas tsev twv txiaj cia siab rau.
Cov kev nkag siab yuam kev uas muaj ntau
Lus lom zem
Tsis yog qhov tshwm sim ntawm ib zaus kiv. Yog qhov nruab nrab ntawm txhua zaus.