Describing a shaded region

Describing a shaded region

Secondary 3
3 marks
TGM Original Questions

The rectangle represents \(\xi\). Only the blue region is shaded.

  1. Write the shaded region using set notation.[1]
  2. A pupil writes \((A\cap B)'\). Explain why this expression also includes an unshaded region.[2]

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Answer:(a) \(A\cap B'\) (b) The proposed expression also includes the B-only and neither regions.

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