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2 marksConditional Probability

CSEC Additional Mathematics · 2016 · Paper 2 · Question 7(b)(ii)

Two events, A and B, are such that P(A) = 0.5, P(B) = 0.8 and P(A∪B) = 0.9.

Determine P(A | B).

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Other parts of this question

  1. 7(a)(i)Construct a stem-and-leaf diagram to represent the given data.[3 marks]
  2. 7(a)(ii)State an advantage of using the stem-and-leaf diagram to represent the given data.[1 mark]
  3. 7(a)(iii)Determine the mode.[1 mark]
  4. 7(a)(iv)Determine the median.[2 marks]
  5. 7(a)(v)Determine the interquartile range.[3 marks]
  6. 7(b)(i)Determine P(A∩B).[2 marks]
  7. 7(b)(iii)State, giving a reason, whether or not A and B are independent events.[2 marks]
  8. 7(c)Find the probability that the balls drawn are all of the same colour.[4 marks]

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