Lemma
MediumPermutations & combinations
OpenStax, Algebra and Trigonometry 2e §13.5 Counting Principles · Exercise 26 · Combinatorics · Permutations & combinations

Counting Principles · Exercise 26

Compute the value of the expression.

~8 minWritten answer · check your work with Lemma

OpenStax, Algebra and Trigonometry 2e · §13.5 Counting Principles · Exercise 26

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.

Your first check today doesn't need an account.

Your photos and PDFs are read once and not stored — only the transcription is kept.