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2.3.10 Conditional probabilities (A-level only)

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Question 30

Events A A\,A and B B\,B satisfy P(A)=0.3P(A)=0.3P(A)=0.3 and P(A∪B)=0.7P(A\cup B)=0.7P(A∪B)=0.7.

a.

Find P(A′∩B′)P(A'\cap B')P(A′∩B′).

[2]
b.

Find P(A′∩B)P(A'\cap B)P(A′∩B). Given also that A A\,A and B B\,B are independent:

[2]
c.

find P(B)P(B)P(B);

[4]
d.

find P(A′∪B′)P(A'\cup B')P(A′∪B′).

[2]
Markscheme

2.3.10 Conditional probabilities (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.3.10 Conditional probabilities (A-level only)

164 exam-style questions on OCR (MEI) A Level Maths 2.3.10 Conditional probabilities (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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