The Multiplication Principle
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State
The Multiplication Principle counts combined choices by multiplying: m ways for the first selection and n for the second make m · n ways in all.
Show
Three routes to the highway and four roads beyond it make 3 · 4 = 12 distinct trips — each route pairs with each road.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.