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Probability - Calculate Normal Probability

Basic-Probabilities Calculator

Free basic statistic probabilities calculation online. Normal Probability is the number of occurrence of an event out of possible outcomes. In statistics, probability calculator is used to calculate the basic probability problems.

Normal Probability Calculator

Single Event Probability
Number of possible outcomes:
Number of events occured:
Result
Probability of event that occurs P(A):
Probability of event that does not occurs P(A'):
Multiple Event Probability  (A & B are mutually exclusive events)
Number of possible outcomes:
Number of event occurs in A:
Number of event occurs in B:
Result
P(A):P(A' ):
P(B):P(B' ):
P(A ? B):P(A ? B):
P(A | B):

Single Event Probability Formula :

Probability of event A that occurs P(A) = n(A) / n(S). Probability of event A that does not occur P(A') = 1 - P(A).

Multiple Event Probability Formula :

Probability of event A that occurs P(A) = n(A) / n(S). Probability of event A that does not occur P(A') = 1 - P(A). Probability of event B that occurs P(B) = n(B) / n(S). Probability of event B that does not occur P(B') = 1 - P(B). Probability that both the events occur P(A ? B) = P(A) x P(B). Probability that either of event occurs P(A ? B) = P(A) + P(B) - P(A ? B). Conditional Probability P(A | B) = P(A ? B) / P(B). where, n(A) - number of occurrence in Event A, n(B) - number of occurrence in Event B, n(S) - total number of possible outcomes.