0580/43 Oct/Nov 2025, Question 12: Basic Probability
Cambridge IGCSE Mathematics 0580 · Paper 43 (Extended) · Calculator · 2 marks
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The question, in short
A vase holds red, pink or white flowers. Given the chance a random flower is not red is 0.9 and not pink is 0.65, find the probability it is white.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1P(red) = 1 − 0.9 = 0.1
- 2P(pink) = 1 − 0.65 = 0.35
- 3P(white) = 1 − (0.1 + 0.35) = 0.55
Answer0.55
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