OCR S4 2015 June — Question 1

Exam BoardOCR
ModuleS4 (Statistics 4)
Year2015
SessionJune
TopicPrinciple of Inclusion/Exclusion
TypeIndependence Testing with Two Events

1 For the events \(A\) and \(B\) it is given that $$\mathrm { P } ( A ) = 0.6 , \mathrm { P } ( B ) = 0.3 \text { and } \mathrm { P } ( A \text { or } B \text { but not both } ) = 0.4 \text {. }$$
  1. Find \(\mathrm { P } ( A \cap B )\).
  2. Find \(\mathrm { P } \left( A ^ { \prime } \cap B \right)\).
  3. State, giving a reason, whether \(A\) and \(B\) are independent.