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2.3 Probability

2.3 Probability

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Question 7

Leroy asks 50 people which of three sports they watch: football (FFF), golf (GGG) and hockey (HHH).

He finds that 5 people watch all three sports, 8 watch football and golf, 7 watch golf and hockey, 9 watch football and hockey, 31 watch football, 13 watch golf and 17 watch hockey.

a.

Draw a Venn diagram to show this information.

[3]
b.

One of the 50 people is selected at random. Given that the person watches football, find the probability that the person does not watch hockey.

[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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