what does nurse ratcheds method of tallying the votes reveal about her character?

Nurse Ratched controls and manipulates the outcomes of the votes. McMurphy cannot win simply by playing by the rules. This is an important point, for it demonstrates that McMurphy is not just an anarchist bent on breaking down any system of governance. He is driven to rebellion by the unfair system around him, one which he could not change from within even if he tried. Note, too, that he does not act with force but with passive resistance, simply continuing to sit after the television is turned off.