Select Distribution
Parameters
(0 to 1)
(0 to 1)
Probability Type
Results
Enter parameters and click "Calculate" to see results
0.0000
0.00%
How to Use the Probability Calculator
The binomial distribution describes the number of successes in a fixed number of independent trials, each with the same probability of success.
Example: If you flip a coin 10 times, what's the probability of getting exactly 5 heads?
- Number of trials (n): 10
- Probability of success (p): 0.5
- Select P(X = x) and enter x = 5
The normal distribution is a continuous probability distribution that is symmetric and bell-shaped.
Example: What's the probability that a value is less than 1 standard deviation above the mean?
- Mean (μ): 0
- Standard Deviation (σ): 1
- Select P(X ≤ x) and enter x = 1
The Poisson distribution gives the probability of a given number of events occurring in a fixed interval of time or space.
Example: If calls come in at an average rate of 3 per hour, what's the probability of getting exactly 5 calls in an hour?
- Average Rate (λ): 3
- Select P(X = x) and enter x = 5