Math
Fundamental Counting Principle Calculator
Multiply the number of choices at each stage to count total outcomes.
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If one choice has m options and the next has n options, together they have m × n combinations.
The math behind it
Multiply the number of independent choices at each stage. Leave a stage at 0 to ignore it.
Worked Example
3 shirts × 4 pants × 2 shoes = 24 outfits.
Frequently Asked Questions
Does order matter here?
This principle counts ordered combinations of independent choices; for arrangements of one set use permutations.
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