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2.3.10 Conditional probabilities (A-level only)

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Question 24

A cafe manager records the drink orders of 80 customers. Customers can order Tea (TTT), Coffee (CCC), or Juice (JJJ).

  • 6 customers ordered all three drinks
  • 12 customers ordered both Tea and Coffee
  • 10 customers ordered both Coffee and Juice
  • 15 customers ordered both Tea and Juice
  • 40 customers ordered Tea
  • 35 customers ordered Coffee
  • 25 customers ordered Juice
a.

Draw a Venn diagram for this information.

[3]
b.

One of the customers is selected at random. Given they ordered Coffee, find the probability they did not order Juice.

[3]

2.3.10 Conditional probabilities (A-level only) Questions

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