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Edexcel A-Level Mathematics AS S1.3.4 Sum and Product Laws Questions

Practise completing probability trees, combining products and complements for exact outcomes, and applying replacement or non-replacement rules to contextual events.

Syllabus
First assessment 2019
Course
Mathematics YMA01
Level
AS

Exam points

  • complete tree diagrams using branch probabilities from the wording
  • calculate at least one or exactly one outcomes using products and complements
  • apply replacement or non-replacement rules when multiplying branch probabilities

Edexcel A-Level Mathematics AS S1.3.4 Sum and Product Laws Questions question 1

[Maximum number: 4]

The histogram shows the times taken, in seconds, by each of 260 people to complete a puzzle.

Figure for Question Edexcel A-Level Mathematics AS S1.3.4 Sum and Product Laws Questions question 1 — Edexcel A-Level Mathematics AS

Estimate the probability that all 3 of their times are less than 36 seconds.

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