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4 Unit A2 2: Applied Mathematics (A-level only)

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Question 326

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

a.

Find P(B)P(B)P(B).

[3]
b.

Find P(B∣A′)P(B \mid A')P(B∣A′).

[3]
Markscheme

4 Unit A2 2: Applied Mathematics (A-level only) Questions

  1. A Level
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