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2.3 Probability

2.3 Probability

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Question 60
67%

The probability a tennis player gets her first serve in court is 65%. If she gets her first serve in court the probability of winning the point is 81%. The chance of getting her second serve in court is 84% and if she gets her second serve in court the chance of winning the point is 59%. If the tennis player fails to get her second serve in court she loses the point.

a.

Draw a tree diagram to show this information.

[3]
b.

Find the probability of the tennis player winning the point.

[2]
Markscheme

2.3 Probability Questions

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

200 exam-style questions on OCR (MEI) A Level Maths 2.3 Probability, covering 2.3.1 Calculate the probability of an event, 2.3.2 Complementary events, 2.3.3 Expected frequency of an event, 2.3.4 Diagrams to calculate probabilities, 2.3.5 Mutually exclusive and independent events, 2.3.6 Add probabilities for mutually exclusive events, 2.3.7 Multiply probabilities for independent events, 2.3.8 Mutually exclusive and independent events (notation) (A-level only), 2.3.9 Venn diagrams for probabilities (A-level only), 2.3.10 Conditional probabilities (A-level only), and 2.3.11 Independence via conditional probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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