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Probability Calculator
Work out the probability of something happening at least once, every time or never over several tries, or exactly X times in N tries.
Tip from Tink: A 1-in-6 chance over 4 tries is still only about 52%.
At least once
51.782%
Every time
0.0772%
Never
48.218%
Exactly X successes in N tries
Exactly 3
15.5095%
Assumes each try is independent, like rolling dice or flipping coins.
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How to use the Probability Calculator
- Enter the chance per try and the number of tries.
- Optionally set N and X for exact counts.
- Read the probabilities.
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