Intersection of two events from a conditional probability, and a probability conditional on a complement

Intersection of two events from a conditional probability, and a probability conditional on a complement

6 marks

Two events \(C\) and \(D\) satisfy \(\mathrm{P}(C)=\frac25\), \(\mathrm{P}(D)=\frac14\) and \(\mathrm{P}(D\mid C)=\frac13\).

  1. Find \(\mathrm{P}(C\cap D)\).[2]
  2. Find the probability that \(C\) occurs, given that \(D\) does not occur.[4]

Solution:

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Answer:(a) \(\frac{2}{15}\) (b) \(\frac{16}{45}\)

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