repeated courses?

[wylie313]

how does ross admissions calculate repeated courses? do they take the average of the 2? or take the higher into consideration when figuring out your gpa. also when talking about science gpa, are the math classes part of that too? or is it just bio, the chems, and physics? bc on their website their requirements are
1 yr bio
1 yr chem
1 yr phys
1 sem math
1 sem english
1 yr o-chem

unfortunately i failed biostats :( but retook it and got a B how will they figure that in?
any and all info is greatly appreciated.