Recent content by alexis866

  1. A

    Probability problem, very hard

    you can delete the post if u want to. i resolve the problem and thanks u for everything
  2. A

    Probability problem, very hard

    hi i don't know. really i tried and tried . can't seem to find a right answer or to resolve it.
  3. A

    Probability problem, very hard

    aaaa
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