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Probability

Probability

Medium
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Question 9
a.

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.

[2]
b.

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).

[2]
c.

Find the value of P(R∩Q)P(R \cap Q)P(R∩Q).

[2]
d.

Find the value of P(R)P(R)P(R).

[2]
Markscheme

Probability Questions

  1. A Level
  2. /Old Maths
  3. /Probability

11 exam-style questions on Edexcel A Level Old Maths Probability. Each one has a worked solution and a mark scheme showing where the marks go.

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