Cacar straight up a roulette
Cacar straight up (cacar lamba ɗaya) a roulette tana sanya tsabar caca a kan lamba ɗaya. Nasarar da ta fi ƙaranci a teburin kuma mafi girman biya, tare da fifikon gidan caca iri ɗaya na 2.70% kamar sauran duka.
Biya da yiwuwar cacar straight up a roulette
Rami ɗaya cikin 37 ne ke cin nasara: 1/37, ko 2.70%. Gidan caca yana biyan 35:1. Biyan adalci a kan ramuka 37 zai zama 36:1; raka'a ɗaya da ta ɓace ita ce fifikon gidan caca.
EV a kowace $1 = (1/37)(35) − (36/37)(1) = −1/37 = −$0.0270
Misalin kuɗin caca
Bambancin sakamako
Asarar da ake tsammani iri ɗaya ce da ta ja, amma bazuwar sakamako ba ɗaya ba ce. A kowace dalar da aka sanya, cacar straight up tana da standard deviation (ma'aunin bazuwar sakamako) na kusan 5.84, idan aka kwatanta da 1.00 ga cacar ɗaya zuwa ɗaya. A juye-juye 100 na $10, ɗan wasan ja yawanci yana cikin ±$100 na abin da ake tsammani; ɗan wasan straight up yawanci yana cikin ±$584.
Halaye
- Tsakiyar sakamakon zaman wasa (median) asara ce mai tsayayye; matsakaici (mean) kuwa yana hawa saboda nasarorin 35:1 da ba kasafai ba.
- Jiran da ake tsammani kafin nasara juyi 37 ne, kuma jira yana yin tsawo fiye da yadda yawancin mutane ke zato: bayan juye-juye 37 har yanzu akwai yiwuwar 36% ta rashin nasara.
- Mafi ƙarancin cacar teburi ga cace-cacen ciki yawanci ya fi ƙasa a kowace tsabar caca, amma sau da yawa akwai mafi ƙarancin jimilla a duk cace-cacen ciki.
- Ana kiran cacar straight up a roulette da plein a gidajen caca masu salon Faransa.
Ɗan barkwanci
Asarar da ake tsammani iri ɗaya da ta ja, tare da bazuwar sakamako mai faɗi sosai.