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3 marksProbability Theory

CAPE Applied Mathematics Unit 1 · 2017 · Paper 2 · Question 3(b)(ii)

Of total monthly production, 60% are manufactured for export and the rest sold locally. 3% of exported items and 4% of local items are defective.

Calculate the probability that an item, selected at random, is defective.

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Other parts of this question

  1. 3(a)(i)Calculate P(N).[3 marks]
  2. 3(a)(ii)State, with reason, whether M and N are independent, and whether M and N are mutually exclusive.[4 marks]
  3. 3(b)(i)In the space provided, draw a clearly labelled tree diagram to show this information.[4 marks]
  4. 3(b)(iii)Given that an item selected at random is defective, calculate the probability that it is an item for export. Give your answer correct to three significant…[3 marks]
  5. 3(c)(i)Determine the value of p.[2 marks]
  6. 3(c)(ii)Calculate E(X) and Var(X).[6 marks]

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