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2.3 Probability

2.3 Probability

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Question 62
69%

A company has three machines that produce a component. Machine A produces 20% of the components, machine B produces 45% of the components and machine C produces the rest of the components.

4% of the components produced are faulty.

Of the components produced by machine A, 3% are faulty and of the components produced by machine B, 5% are faulty.

Find the percentage of components produced by machine C that are faulty.

[3]
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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