Each letter of the word movers is written on an individual paper strip and placed in a box which set represents the favorable outcomes of the event of randomly choosing a constant letter with the answer. Be M, v, R, S Or would it be v,r,s, or m,o,v,e,r,s or o, e

The set of favorable outcomes of randomly choosing a constant letter would be just one constant letter: M. So, the answer is M.