Author note — to cover

Build a two-set Venn diagram from worded survey counts by placing the intersection first, subtracting outwards, and deducing the outside region from the total; include versions giving the union instead. Three-set completion leans Higher. Both tiers. Probabilities from the finished diagram sit on the sibling page. (P6)

• Fluency — direct questions on filling in a venn diagram, 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).