Probability Calculator
StatisticsCalculate the probability of single, combined, and complementary events.
P(A and B)
Probability both events occur.
P(A or B)
58.00
Probability at least one event occurs.
P(Not A)
60.00
Probability event A does not occur.
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Odeh Ahwal0people find this calculator helpful
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Saved
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Statistics calculators
Frequently Asked Questions
What is the difference between independent and mutually exclusive events?
Independent events do not affect each other — one occurring has no bearing on the other (like two coin flips). Mutually exclusive events cannot happen at the same time (like rolling a 3 and a 5 on one die).
How do I calculate P(A and B)?
For independent events, multiply the individual probabilities: P(A) × P(B). Mutually exclusive events cannot both happen, so P(A and B) is always 0.
How do I calculate P(A or B)?
For independent events, add the probabilities and subtract the overlap: P(A) + P(B) − P(A and B). For mutually exclusive events, simply add the two probabilities since there is no overlap.
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