Expected value ya amsa tambaya ɗaya: idan ka saka wannan kwalle gida dubu, za ka dauki gaba? Ana kirga shi ne (yiwuwar samun nasara × decimal odds) − 1, bayyana per unit staked. Positive EV (+EV) yana nufin farashin ya karya gaskiya yiwuwa; negative EV yana nufin margin na bookmaker ko dacewar fiye-fiye tana aiki a kakanki.
EV shine fasalin dogon lokaci. +EV kwalle na iya asara sau da yawa jeri, kuma −EV kwalle na iya saduwa — variance yana damre samari. Adalci na saye masu karfi shine ki'i yarda da hukunci ta duka sakamako gida kuma yi hukunci ta farashin da ka dauki maimaita. Sakamakon damifu da damifu, sakamakon ya zo jiya zua gida.
Ka yi imani cewa zane shine kashi 30% yiwuwa kuma ka samo odds na 3.75. EV = (0.30 × 3.75) − 1 = +0.125 — karfin da aka yi jira 12.5p riba per £1 staked. Idan yankin yiwuwar ka dace, kwalle saka wannan farashin maimaita yana ba da riba ko da yake asara 70% na lokaci.