A 5 before a 7
You roll two dice repeatedly. What is the probability that a total of 5 appears before a total of 7? Give a decimal.
Show hints (2)+
- Only the rolls that are 5 or 7 matter.
- Condition on 'a 5 or 7 occurred'.
Answer
Reveal answer →Final answer
0.4 (± 0.005)
Want the full step-by-step worked solution? It's part of Premium — along with a worked solution for every question in the bank.
Asked at: Optiver, Akuna Capital