P(A) = n(E) n(S)P (A) represents the probability of the event.N (S) instead of all that happened.N (E) represents the number of events that occur in the result.
P (A) = "n (E) under the n (S).P (A). Instead, the probability of an event.N (S) under the effect instead. All that had happened.N (E) "instead of as a result of the event.