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2.3.10 Conditional probabilities (A-level only)

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Question 45

A media analyst surveys 120 people about which streaming services they use. They can choose from Netflix (NNN), Disney+ (DDD), and Amazon Prime (AAA).

15 people use all three services. 25 people use Netflix and Disney+. 22 people use Disney+ and Amazon Prime. 30 people use Netflix and Amazon Prime. 70 people use Netflix. 50 people use Disney+. 60 people use Amazon Prime.

a.

Draw a Venn diagram for this information.

[3]
b.

One of the people is selected at random. Given they use Amazon Prime, find the probability they do not use Netflix.

[3]

2.3.10 Conditional probabilities (A-level only) Questions

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