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Conditional Probability

Conditional Probability

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Question 19

The events A and B are such that P(A)=0.6P(A) = 0.6P(A)=0.6, P(B)=0.5P(B) = 0.5P(B)=0.5, P(A∩B)=0.3P(A \cap B) = 0.3P(A∩B)=0.3. Find

a.

P(A∪B)P(A \cup B)P(A∪B)

[2]
b.

P(A∣B)P(A|B)P(A∣B)

[3]
c.

P(A′∣B′)P(A'|B')P(A′∣B′)

[3]
d.

Hence find P(B′∣A′)P(B'|A')P(B′∣A′)

[2]
Markscheme

Conditional Probability Questions

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

368 exam-style questions on Edexcel A Level Maths Conditional Probability, covering 2.1 Set Notation, 2.2 Conditional Probability, 2.3 Conditional Probabilities in Venn Diagrams, 2.4 Probability Formulae, and 2.5 Tree Diagrams. Each one has a worked solution and a mark scheme showing where the marks go.

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