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This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AQA GCSE (9-1) Foundation (UK)P: ProbabilityP1: Frequencies in Tables and TreesBasic Probability Problems-
CBSE IX (India)ProbabilityExperimentsRepeated experiments-
CBSE X (India)Statistics and ProbabilityProbabilityDefinition-
CIE IGCSE (9-1) Maths (0626 UK)8 ProbabilityC8.1 Calculating a ProbabilityBasic Probability Problems-
Edexcel GCSE (9-1) Foundation (UK)P: ProbabilityP1: Frequencies in Tables and TreesBasic Probability Problems-
GCSE Foundation (UK)ProbabilityProbabilityBasic problems-
OCR GCSE (9-1) Foundation (UK)11: Probability11.01d: Equally Likely Outcomes and ProbabilityBasic Probability Problems-
Universal (all site questions)PProbabilityBasic problems-