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1. Let R be the event that it is a rainy day and let U be the event that I brought my umbrella to
the office. We know that P(R^c) = 19/20, P(U) = 3/40 and P(U | R) = 3/4. What is the probability
that it is a rainy day if you see my umbrella in the office? Write your answer in the box provided
and show any working below. [2 marks]
Solution

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1. Let R be the event that it is a rainy day and let U be the event t.pdf

  • 1. 1. Let R be the event that it is a rainy day and let U be the event that I brought my umbrella to the office. We know that P(R^c) = 19/20, P(U) = 3/40 and P(U | R) = 3/4. What is the probability that it is a rainy day if you see my umbrella in the office? Write your answer in the box provided and show any working below. [2 marks] Solution