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2.3.10 Conditional probabilities (A-level only)

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Question 11

A screening test is used on a population in which 4% of people have a condition. The test gives a positive result for 92% of people with the condition and for 6% of people without it.

a.

Find the probability that a randomly selected person tests positive.

[2]
b.

Given that a person tests positive, find the probability that the person has the condition.

[3]
Markscheme

2.3.10 Conditional probabilities (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.3.10 Conditional probabilities (A-level only)

164 exam-style questions on OCR (MEI) A Level Maths 2.3.10 Conditional probabilities (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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