Given that P(A)=aP(A) = aP(A)=a and P(B)=bP(B) = bP(B)=b express P(A∪B)P(A \cup B)P(A∪B) in terms of a a\,a and b b\,b when
(i) A A\,A and B B\,B are mutually exclusive,
(ii) A A\,A and B B\,B are independent.
Two events R R\,R and Q Q\,Q are such that P(R∩Q′)=0.15P(R \cap Q') = 0.15P(R∩Q′)=0.15, P(Q)=0.35P(Q) = 0.35P(Q)=0.35 and P(R∣Q)=0.1P(R | Q) = 0.1P(R∣Q)=0.1. Find the value of P(R∪Q)P(R \cup Q)P(R∪Q).
Find the value of P(R∩Q)P(R \cap Q)P(R∩Q).
Find the value of P(R)P(R)P(R).
Practise Edexcel A Level Old Maths Probability with exam-style questions for A Level Old Maths. 11 questions, matched to the Edexcel A Level Old Maths (9371) specification and written in Unit exams C1, C2, C3 and C4 plus two applied units (e.g. S1 and M1) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.