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4.1 Probability (A-level only)

4.1 Probability (A-level only)

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Question 41

The events X X\,X and Y Y\,Y are such that P(X)=0.8P(X) = 0.8P(X)=0.8, P(Y)=0.6P(Y) = 0.6P(Y)=0.6, and P(X∩Y)=0.5P(X \cap Y) = 0.5P(X∩Y)=0.5. Find

a.

P(X∪Y)P(X \cup Y)P(X∪Y)

[2]
b.

P(X∣Y)P(X|Y)P(X∣Y)

[3]
c.

P(X′∣Y′)P(X'|Y')P(X′∣Y′)

[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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