> Undeleted then **Deleted _again_** by author.

I'd like to have [this question][1] undeleted. The question owner has deleted it for some reason _after_ I provided the solution (which he upvoted and accepted) for seemingly no reason.

 **EDIT:** This user has once again deleted the question for no good reason after I responded to a comment on that question by @JohnMa...

  [1]: https://math.stackexchange.com/questions/2656605/probability-mass-function-problem-y-x2