OpenStax, Algebra and Trigonometry 2e §13.5 Counting Principles · Exercise 7 · Combinatorics · Permutations & combinations
Counting Principles · Exercise 7
Solve counting problems using the multiplication principle.
In Missouri, license plates have 3 letters and 3 numbers. How many license plates, consisting of 3 letters followed by 3 digits are possible?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Algebra and Trigonometry 2e · §13.5 Counting Principles · Exercise 7
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