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2.3 Probability

2.3 Probability

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Question 13

A component is made by machine A, B or C with probabilities 0.40, 0.35 and 0.25 respectively. Their respective fault probabilities are 0.03, 0.02 and 0.01.

a.

Draw a probability tree.

[3]
b.

Find the probability that a randomly selected component was made by A and is faulty.

[1]
c.

Find the probability that a randomly selected component is faulty.

[2]
Markscheme

2.3 Probability Questions

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

36 exam-style questions on WJEC A Level Maths 2.3 Probability, covering 2.3.1 Probability and 2.3.2 Probability. Each one has a worked solution and a mark scheme showing where the marks go.

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