4MA1/1HR Jun 2024, Question 2: Probability from Tables and Charts
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 4 marks
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The question, in short
Use the probability table for a biased 5-section spinner, with probabilities in terms of x, to estimate how many odd results occur in 400 spins.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 4 marks
- 11 − (0.27 + 0.04 + 0.12) = 0.57
- 20.57 ÷ 3 = 0.19
- 32x = 2 × 0.19 = 0.38
- 4Probability of odd numbers = 0.38 + 0.04 + 0.12 = 0.54
- 50.54 × 400 = 216
Answer216
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