Final answer:
The details on the original number of people on the train with Elie Wiesel and the number of survivors are not provided. The train rides during the Holocaust typically ended in various extermination and concentration camps as part of the Nazis' genocidal plans. The references underscore the extreme conditions and inhumanity suffered by the victims.
Step-by-step explanation:
The question pertains to Elie Wiesel's experience during the Holocaust, as described in his memoir. The exact number of people in the same train car as Elie Wiesel is not given in the provided excerpts, nor is the number of survivors at the end of the trip specified.
The trains during the Holocaust took many Jewish people to various extermination camps and concentration camps in Eastern Europe, with the infamous Auschwitz being just one of them. These camps were a part of the Nazis' genocidal campaign against Jews and other groups they considered undesirable.
The provided reference to the discovery of railway cars filled with corpses by the Allied infantry reveals the grim reality of the camps' conditions and the inhumanity suffered by those transported. The references to death marches and the forced movement of prisoners as the war was ending also indicate the severe hardships endured by the prisoners.