Free Independent Events Calculator
Calculate the joint probability of two independent events occurring together by multiplying their individual probabilities.
P(A and B)
0.150000
P(A or B)0.650000
P(Neither)0.350000
P(A and B) vs P(A)
How to Calculate Joint Probability of Independent Events
Formula
P(A and B) = P(A) * P(B)
Two events are independent if the occurrence of one does not affect the probability of the other. For independent events, the joint probability is simply the product of the individual probabilities. This extends to any number of events: P(A and B and C) = P(A) * P(B) * P(C).
Example Calculation
A coin has P(heads) = 0.5 and a die has P(six) = 0.3 (loaded). What is the probability of both?
- 01P(A and B) = P(A) * P(B)
- 02P(heads and six) = 0.5 * 0.3 = 0.15
- 03P(heads or six) = 0.5 + 0.3 - 0.15 = 0.65
- 04P(neither) = (1 - 0.5) * (1 - 0.3) = 0.5 * 0.7 = 0.35
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