Given odds against of an event say A is given to be 7 : 2 , therefore probability of happening of the event A i.e. P(A) = 2/(7+2) = 2/9 & probability of not happening of the event A that is P(A') = 7/9 .If the odds in favor of an event A are 5:3, what is the probability of event A?quora : If-the-odds-in-favor-of-an-event-A-are-5-3-what-is-the-...bwin tabela números da roleta