I was solving a maths question. It said that :
John and Lara had 45 marbles in total .- ---------------and so on
John and Lara together had 45 marbles .
What should be used:
"Together" or "in total"?
Both are fine. The important thing in maths questions is to be unambiguous, and here I think both sentences work. If, later on, you refer to how many marbles John has and how many Lara has, I would probably prefer the first option, as the second has a slight suggestion that the marbles don't belong to either one of them on their own.