Sum of seven given a known die

Two fair six-sided dice are rolled and you learn the first die shows 3. What is the probability the sum is 7? Give your answer as a decimal (to 2 decimals).

Show hints (2)+
  1. The first die is fixed — only the second matters.
  2. Which single value of the second die works?

Answer

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0.17 (± 0.01)

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Asked at: Akuna Capital, Flow Traders

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