Answer Key — Combinatorics and probability
Finite mathematics
Do not share with students before practice tests.
Worksheets — Sets 1–10
| Set | Guidance | | --- | --- | | Set 1 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 2 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 3 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 4 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 5 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 6 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 7 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 8 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 9 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 10 | Combinatorics and probability — verify written work and accept reasonable drawings. |
Worksheets — Sets 11–20
| Set | Guidance | | --- | --- | | Set 11 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 12 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 13 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 14 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 15 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 16 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 17 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 18 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 19 | Combinatorics and probability — verify written work and accept reasonable drawings. | | Set 20 | Combinatorics and probability — verify written work and accept reasonable drawings. |
Review tiers 1–10
- Checklists are parent-judged.
- Written items: verify against practice set patterns.
- Standard text: Permutations and combinations Binomial coefficients and the binomial theorem (applications) Sample spaces, events, and probability axioms Conditional probability and independence Expected value for discrete random variables (introduction)
Practice test scoring
| Tier | Pass guidance | | --- | --- | | 1–3 | Most oral tasks smooth; majority of written correct | | 4–6 | 7/10+ total with clear understanding | | 7–8 | 9/12+ with explanations | | 9–10 | Near-perfect; ready to move on |
___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________