Edexcel S1 2017 June — Question 3

Exam BoardEdexcel
ModuleS1 (Statistics 1)
Year2017
SessionJune
TopicConditional Probability
TypeConditional probability with algebraic expressions

  1. The Venn diagram shows three events \(A , B\) and \(C\), where \(p , q , r , s\) and \(t\) are probabilities.
    \includegraphics[max width=\textwidth, alt={}, center]{319667e7-3f8b-4a33-8fc5-ef72154d1421-10_647_972_306_488}
    (b) Find the value of \(r\).
    (c) Hence write down the value of \(s\) and the value of \(t\).
    (d) State, giving a reason, whether or not the events \(A\) and \(B\) are independent.
    (e) Find \(\mathrm { P } ( B \mid A \cup C )\).
    \(\mathrm { P } ( A ) = 0.5 , \mathrm { P } ( B ) = 0.6\) and \(\mathrm { P } ( C ) = 0.25\) and the events \(B\) and \(C\) are independent.
    (a) Find the value of \(p\) and the value of \(q\).