Question 1142648
if the probability for an event is .15, then the probability against the event is (1 - .15) = .85.
the odds for the event is the probability for divided by the probability against = .15 / .85 = 15 / 85 = 3 / 17 = 3:17.
the odds against the event is the probability against divided by the probability for = .85 / .15 = 85 / 15 = 17 / 3 = 17:3.


here's a reference.


<a href = "https://stats.seandolinar.com/statistics-probability-vs-odds/" target = "_blank">https://stats.seandolinar.com/statistics-probability-vs-odds/</a>