Independent Events Calculator
🎲 Statistics & probability. Use the Independent events (AND rule) formula to find p(a and b), p(a), p(b): pick the value you want, type the others, and the answer updates as you go.
P(A and B)0.15
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 |
|---|---|
| P(A and B) | no unit |
| P(A) | no unit |
| P(B) | no unit |
Worked example
Find the p(a and b) when P(A) = 0.5, P(B) = 0.3.
Using P(A and B) = P(A) × P(B): P(A and B) = 0.15.
Frequently asked questions
What is the formula for Independent events (AND rule)?
P(A and B) = P(A) × P(B).
What do the letters stand for, and what units are used?
P(A and B), P(A), P(B).
How do you calculate p(a and b)?
Put the values into P(A and B) = P(A) × P(B). For example, with P(A) = 0.5, P(B) = 0.3, p(a and b) = 0.15.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (p(a and b), p(a), p(b)) and fill in the others: it rearranges the formula for you.
