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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.

Related Article:
>>Single event probability
>>Multiple event probability

Related Calculators


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.

This tool will dynamically help you to calculate basic normal statistics probabilities online.

Related Article:
>> Single event probability.
>> Multiple event probability.