Probability

Fundamental Counting Principle

Multiply the number of choices at each stage to find the total number of outcomes. Enter a comma-separated list of choices per stage and see the running product.

Live Calculator · Step-by-Step · Probability
Inputs
Each number = how many choices at that stage. Example: 3,4,2 means 3×4×2 = 24 outcomes.
Result
Result
Enter values and calculate.

Step-by-Step Work

Your explanation will appear here.

Visual: Stage × Stage × ... = Total
Put It Into Practice

The calculator shows the steps — a quiz proves you can do them on your own.

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