Expected Frequency Calculator
🎲 Statistics & probability. Use the Expected frequency formula to find expected number, probability, number of trials: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Expected number | no unit |
| Probability | no unit |
| Number of trials | no unit |
Worked example
Find the expected number when Probability = 0.5, Number of trials = 100.
Using expected = P × number of trials: Expected number = 50.
Frequently asked questions
What is the formula for Expected frequency?
expected = P × number of trials.
What do the letters stand for, and what units are used?
Expected number, Probability, Number of trials.
How do you calculate expected number?
Put the values into expected = P × number of trials. For example, with Probability = 0.5, Number of trials = 100, expected number = 50.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (expected number, probability, number of trials) and fill in the others: it rearranges the formula for you.
