Calculate the probability of a single event, or the combined probability of two independent events.
For a single event, enter the number of favorable outcomes and total possible outcomes (e.g. rolling a specific number on a die: 1 favorable out of 6 total). For two independent events, enter each event's probability as a percentage to find the combined probability.
P(Event) = Favorable Outcomes รท Total Outcomes
P(A and B) = P(A) ร P(B) | P(A or B) = P(A) + P(B) โ P(A and B)
Note: the two-event formulas assume A and B are independent events.