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2.3 Probability

2.3 Probability

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Question 3
74%

A survey is conducted among 60 university students regarding which extracurricular clubs they have joined. They can choose from Art club (AAA), Biology club (BBB), and Chess club (CCC).

  • 4 students are in all three clubs
  • 10 students are in both Art and Biology clubs
  • 7 students are in both Biology and Chess clubs
  • 9 students are in both Art and Chess clubs
  • 32 students are in the Art club
  • 24 students are in the Biology club
  • 18 students are in the Chess club
a.

Draw a Venn diagram to represent this information.

[3]
b.

One of the students is selected at random. Given they are in the Art club, find the probability they are not in the Chess club.

[3]
Markscheme

2.3 Probability Questions

  1. A Level
  2. /Maths
  3. /2.3 Probability

200 exam-style questions on OCR A Level Maths 2.3 Probability, covering 2.3.1 Mutually exclusive and independent events, 2.3.2 Diagrams to assist probability calculations, 2.3.3 Conditional probability (A-level only), 2.3.4 Conditional probability from first principles (A-level only), and 2.3.5 Modelling with probability. Each one has a worked solution and a mark scheme showing where the marks go.

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