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4.1.1 Probability (A-level only)

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Question 83

Events AAA and BBB are such that:

P(A∩B)=0.2 P(A \cap B) = 0.2 P(A∩B)=0.2 P(A′∩B′)=0.1 P(A' \cap B') = 0.1 P(A′∩B′)=0.1 P(B)=3P(A) P(B) = 3P(A) P(B)=3P(A)
a.

Find P(A)P(A)P(A).

[4]
b.

Find P(B∣A)P(B|A)P(B∣A).

[2]
c.

Determine if AAA and BBB are independent events.

[1]
Markscheme

4.1.1 Probability (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.1.1 Probability (A-level only)

111 exam-style questions on WJEC A Level Maths 4.1.1 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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