A three given a sum divisible by three
Two fair dice are rolled. Given that their sum is divisible by 3, what is the probability that at least one die shows a 3? Give a decimal to four places.
Show hints (2)+
- Which sums are divisible by 3? Count the ordered pairs for each.
- Among those 12 outcomes, which contain a 3?
Answer
Reveal answer →Final answer
0.25 (± 0.001)
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Asked at: Timed Mental-Math & Sequences, Options Market-Making