Sigh. Let's start with the life expectancy. Yes, many many children died before the age of 10 - in some places up to 50 %

Which means that you were most likely to die as a baby, next most likely as a child and finally (especially if you were male) in a fight in your teens. If you made it to the age of 30 you were probably unkillable and would stick around until your fifties or sixties.

Most people didn't die at age 24 if they made it through childhood.