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Choose the relevant denominator - Paper 1

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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Invented results table. Group A: pass 5, fail 7. Group B: pass 8, fail 4. Select one of all 24 records uniformly unless a 'given' condition restricts the selection. These are distinct counts, not percentages. Label your denominator before simplifying each probability.

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