It's a grim question, but I think it's not meaningless.
If a 100 soldiers are conscripted from a village in 1941, on average, how many of them would come back alive in 1945? Maybe 2? or 3? or 5? or 6?
How about 100 people conscripted in 1942/3/4 and 1945 respectively? Would the chance of them surviving the war be higher?
A typical Soviet rifle company sent to the front in 1941, which had around 100+ men, how many might survive in 1945?
A typical Soviet military school for young officers, a class with 100 student, what's the number of students who might survive?
An average Soviet city of 100 000 people, with an average number of Jews and Slavs as per other occupied regions, gets occupied by the Nazis, what's the ratio of its pre-war population who might survive this? (And survive Stalin's post-war purges and food requisition). How is the survival rate be higher or lower in Finnish, Romanian and other Axis occupation zone?