4MA1/1HR Jan 2020, Question 16: Tree Diagrams for Independent Events
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 4 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Given P(tennis win) = 0.6 and P(both wins) = 0.42, work out the probability that Steffi wins neither game.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 4 marks
- 1P(win chess) = 0.42 ÷ 0.6 = 0.7
- 2P(lose tennis) = 1 − 0.6 = 0.4
- 3P(lose chess) = 1 − 0.7 = 0.3
- 4P(win neither) = 0.4 × 0.3 = 0.12
Answer0.12
Stuck on a step? Read the free lesson: Tree Diagrams for Independent Events
Practise more tree diagrams for independent events questions
Real 4MA1 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on tree diagrams for independent events
Also searched as: 4MA1 1HR January 2020 · 4MA1/1HR · 4ma1 jan20 1hr · question 16.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.