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4.1 Probability (A-level only)

4.1 Probability (A-level only)

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Question 51

The events A and B are such that P(A)=320\displaystyle P(A) = \frac{3}{20}P(A)=203​, P(A∩B)=120\displaystyle P(A \cap B) = \frac{1}{20}P(A∩B)=201​, P(A∣B)=514\displaystyle P(A|B) = \frac{5}{14}P(A∣B)=145​. Find

a.

P(B)P(B)P(B)

[3]
b.

P(A∪B)P(A \cup B)P(A∪B)

[3]
c.

P(B∣A′)P(B|A')P(B∣A′)

[3]
Markscheme

4.1 Probability (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.1 Probability (A-level only)

164 exam-style questions on WJEC A Level Maths 4.1 Probability (A-level only), covering 4.1.1 Probability (A-level only), 4.1.2 Probability (A-level only), and 4.1.3 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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