College Algebra / Unit 9 Alg 511 short lesson, about 20 seconds
The Multiplication Principle
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The idea
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.
In practice
Three routes to the highway and four roads beyond it make 3 · 4 = 12 distinct trips — each route pairs with each road.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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