It looks like we've reached a consensus that, with the [ENDED] tag to clear things up, on-topic necroposting is allowed for after-the-fact optimizations or programming/golf tips. Therefore:
The only optimization I see in the top two TI-BASIC solutions is that on a MathPrint calculator, cumSum(binomcdf(14,0 can be randIntNoRep(1,14, saving two bytes at the cost of speed, since order does not matter. Either calc84maniac or Runer112 could have won the contest outright at 44 bytes if they had done this. Both of them noticed that If A≠1 could be optimized to If log(A, which is small but hard to notice.