So basically I want to know the answer to the tin. Does anyone know?
About 2.5 billion people who were alive in August 1939 were still alive in May 1945.
But I don't suppose you would consider that a useful answer to your question.
I guess the precise question would be: how many people who were at risk of being murdered by Nazi Germany and its satellites in 1939 to 1945 were
not murdered?
Or perhaps you want to know: how many
Jews who were at risk of being murdered by Nazi Germany and its satellites in 1939 to 1945 were
not murdered?
However, this excludes from "the Holocaust" millions of murders perpetrated by Germany against Roma, Soviet PoWs, Poles, and other categories. But "the Holocaust" usually refers only to the mass murder of Jews.
So another limit might be "Jews in the custody of Germany or those satellites which also murdered Jews". Would a Jew who evaded German custody count as a survivor? For instance, a Soviet Jew who hid out in the woods during the German occupation of his district. Or a man my late neighbor Ruth once knew in Norway: her employer, a Jewish dentist, who fled to Sweden with his family the day after the German invasion.
Without such a definition, the question cannot be answered.
How about this? How many Jews were prisoners of the Germans on V-E Day, i.e. had not been killed yet?