Author note — to cover (Higher)

Read P(A given B) from a completed two-way table as the named cell over the row or column total the condition fixes, never the grand total; contrast P(A given B) with P(B given A) from the same table. Higher tier only. Completing the table is both-tier work on two-way-tables (Diagrams topic). (P9)

• Fluency — direct questions on conditional probability from a two-way table, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).