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4.1 Probability (A-level only)

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Question 10

For the events CCC and DDD, it is given that:

P(C′∩D)=0.35andP(C′∩D′)=0.25 P(C' \cap D) = 0.35 \quad \text{and} \quad P(C' \cap D') = 0.25 P(C′∩D)=0.35andP(C′∩D′)=0.25
a.

Find P(C)P(C)P(C).

[2]
b.

Find P(C∪D)P(C \cup D)P(C∪D).

[2]
c.

Given that P(C∣D)=0.125P(C|D) = 0.125P(C∣D)=0.125,

find P(C∩D)P(C \cap D)P(C∩D).

[4]
d.

Determine whether or not CCC and DDD are independent.

[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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