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2.3 Probability

2.3 Probability

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Question 107

Raheem inspects 50 cars for three types of fault, FFF, G G\,G and HHH.

5 cars have all three faults.

8 cars have fault F F\,F and fault GGG.

7 cars have fault G G\,G and fault HHH.

9 cars have fault F F\,F and fault HHH.

31 cars have fault FFF, 13 cars have fault G G\,G and 17 cars have fault HHH.

a.

Draw a Venn diagram to represent this information.

[3]
b.

Two of the 50 cars are selected at random. Find the probability that both have fault FFF.

[2]
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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