A ratio of the number of ways something can occur to the number of ways it cannot occur.
The odds of a month being August are 1 : 11 (August vs all other months)
The odds of a coin landing heads up is 1 : 1 (heads vs tails)
A ratio of the number of ways something can occur to the number of ways it cannot occur.
The odds of a month being August are 1 : 11 (August vs all other months)
The odds of a coin landing heads up is 1 : 1 (heads vs tails)