Probability two dice sum to a prime
Two fair six-sided dice are rolled. What is the probability that their sum is a prime number? Give a decimal to four places.
Show hints (2)+
- Which sums between 2 and 12 are prime? (Remember 2; exclude 9.)
- Count the ordered pairs for each, then divide by 36.
Answer
Reveal answer →Final answer
0.4167 (± 0.005)
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Asked at: Options Market-Making, ETF Market-Making