Let's say you make an A (4.0) in physics at your CC (5 credits) and you previously had a C (2.0) in your previous physics in the lecture (3 credits) and a B (3.0) in lab (1 credit).
To average all of this, you would do [ (4 x 5) + (2 x 3) + (3 x 1) ]/ (5+3+1) = 3.22
When grades are averaged, to calculate your GPA, you just multiply the number associated with the letter grade (A=4, B=3, etc..) with the number of credits and you divide by the total number of credits. Most of the time it would be the same as just adding the two grades and dividing by two, but since the physics you're retaking is actually worth more credits then the one you previously took, if you make a really good grade, it'll actually help you because this grade will count more than the other one when averaged.[/QUOTEThans