2024 CJC H1 Q8

2024 CJC H1 Q8

7 marks

Events \(A\) and \(B\) are such that \(\mathrm{P}(B) = 0.25\), \(\mathrm{P}(B \cap A') = 0.15\) and \(\mathrm{P}(A \cap B') = p\).

  1. Find \(\mathrm{P}(A)\) in terms of \(p\).[3]
  2. If events \(A\) and \(B\) are independent, calculate the value of \(p\).[2]
  3. Find \(\mathrm{P}(A \cap B | B)\).[2]
Answer:(a)p+0.1 (b)p=0.3 (c)required probability = 0.4

Need help? Join our JC Math tuition classes.

Learn more