Edexcel S1 2022 October — Question 6

Exam BoardEdexcel
ModuleS1 (Statistics 1)
Year2022
SessionOctober
TopicConditional Probability
TypeConditional probability with algebraic expressions

  1. The Venn diagram shows the events \(A , B , C\) and \(D\), where \(p , q , r\) and \(s\) are probabilities.
    \includegraphics[max width=\textwidth, alt={}, center]{1fda59cb-059e-4850-810f-cc3e69bc058e-20_504_826_296_621}
    1. Write down the value of
      1. \(\mathrm { P } ( A )\)
      2. \(\mathrm { P } ( A \mid B )\)
      3. \(\mathrm { P } ( A \mid C )\)
    Given that \(\mathrm { P } \left( B ^ { \prime } \cap D ^ { \prime } \right) = \frac { 7 } { 10 }\) and \(\mathrm { P } ( C \mid D ) = \frac { 3 } { 5 }\)
  2. find the exact value of \(q\) and the exact value of \(r\) Given also that \(\mathrm { P } \left( B \cup C ^ { \prime } \right) = \frac { 5 } { 8 }\)
  3. find the exact value of \(s\)