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Choose the relevant denominator - Online practice 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 6, fail 4. Group B: pass 3, fail 7. Select one of all 20 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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